Grundy County is located in northeastern Illinois, southwest of Chicago, along the Illinois River and the corridor of Interstate 55. Established in 1841 and named for U.S. Attorney General Felix Grundy, the county developed around river transportation, agriculture, and later industrial growth tied to regional rail and highway networks. Grundy County is mid-sized by Illinois standards, with a population of about 52,000 (2020). Its landscape includes river valleys, floodplain wetlands, and broad stretches of farmland, alongside suburbanizing areas influenced by the greater Chicago region. The local economy reflects a mix of manufacturing and logistics, energy-related industry, and services, with agriculture remaining part of the county’s rural identity. Communities such as Morris and Coal City contribute to a blend of small-city and rural character. The county seat is Morris.

Grundy County Local Demographic Profile

Grundy County is located in northeastern Illinois, southwest of the Chicago metropolitan area, and includes communities along the Illinois River corridor. The county seat is Morris; for county government information and planning resources, visit the Grundy County official website.

Population Size

According to the U.S. Census Bureau QuickFacts page for Grundy County, Illinois, Grundy County had an estimated population of 52,898 (2023).

Age & Gender

County-level age distribution and sex breakdown are published by the U.S. Census Bureau via QuickFacts and ACS profiles. According to the U.S. Census Bureau (QuickFacts):

  • Age distribution (selected indicators)

    • Under 18 years: 23.2%
    • 65 years and over: 15.8%

  • Gender ratio (sex)

    • Female persons: 50.2%
    • Male persons: 49.8%

Racial & Ethnic Composition

The U.S. Census Bureau reports race and Hispanic/Latino ethnicity for Grundy County through QuickFacts (ACS-based for many items). According to the U.S. Census Bureau (QuickFacts):

  • White alone: 89.9%
  • Black or African American alone: 2.0%
  • American Indian and Alaska Native alone: 0.2%
  • Asian alone: 1.2%
  • Native Hawaiian and Other Pacific Islander alone: 0.0%
  • Two or more races: 6.5%
  • Hispanic or Latino (of any race): 9.0%

Household & Housing Data

Household and housing characteristics are published by the U.S. Census Bureau through QuickFacts. According to the U.S. Census Bureau (QuickFacts):

  • Households (2018–2022): 18,626
  • Persons per household (2018–2022): 2.74
  • Owner-occupied housing unit rate (2018–2022): 78.9%
  • Median value of owner-occupied housing units (2018–2022): $258,300
  • Median gross rent (2018–2022): $1,197
  • Housing units (2023): 19,969

Email Usage

Grundy County, Illinois is a largely exurban/rural county southwest of Chicago where lower population density and longer last‑mile distances can constrain fixed‑network buildout and influence reliance on mobile connectivity for digital communication. Direct county-level email usage statistics are not published; broadband and device access serve as proxies for likely email access.

Digital access indicators are available via the U.S. Census Bureau (data.census.gov) and the American Community Survey, including household broadband subscription and computer ownership. These measures track the practical ability to maintain email accounts and use them regularly.

Age distribution affects email adoption because older cohorts tend to use email for services, healthcare, and government communication, while younger cohorts often substitute messaging platforms; county age structure can be referenced through ACS demographic tables. Gender distribution is generally not a primary driver of email access relative to broadband/device availability; county sex composition is also available in ACS.

Connectivity limitations are best characterized using FCC National Broadband Map coverage and provider data and state planning resources such as the Illinois Office of Broadband.

Mobile Phone Usage

Grundy County is in northeastern Illinois, southwest of the Chicago metropolitan area, and includes small cities and villages such as Morris, Coal City, and Minooka. Land cover is a mix of developed areas along major corridors (notably I‑80 and the Illinois River valley) and lower-density residential and agricultural areas elsewhere. These settlement patterns and the presence of river corridors can influence mobile connectivity by concentrating infrastructure investment along highways and population centers while leaving more variable performance in less-dense areas.

Key distinction: network availability vs. household adoption

  • Network availability refers to whether mobile broadband service (by technology generation such as LTE/4G or 5G) is reported as offered in a location.
  • Household adoption refers to whether residents actually subscribe to mobile service (voice and/or mobile broadband) and whether households rely on mobile service as their primary internet connection.

County-level adoption metrics often come from surveys and may not align precisely with provider-reported coverage. Provider-reported availability can overstate on-the-ground performance, especially at the edges of coverage.

Mobile penetration and access indicators (adoption)

County-specific mobile subscription and smartphone ownership measures are limited. The most commonly cited public datasets measure adoption at the state level or for broad geographies, not consistently at the county level.

  • Household internet subscription context (including cellular-data-only households): The U.S. Census Bureau’s American Community Survey (ACS) includes estimates for household internet subscription types (such as cellular data plans) and computer ownership. Availability and reliability of these estimates vary by geography and year, and some detailed breakouts can be suppressed or have large margins of error for smaller areas. Source: U.S. Census Bureau American Community Survey (ACS).
  • Device access context (computing devices vs. internet subscription): ACS also reports household device availability (desktop/laptop, smartphone, tablet), which can be used to contextualize smartphone prevalence relative to other device types, subject to the same geographic limitations. Source: data.census.gov.

Limitation: A single definitive “mobile penetration rate” (e.g., percent of individuals with a mobile subscription) is typically not published at the county level in a standardized federal series. County-level insights usually rely on modeled estimates from commercial sources, which are not always publicly reproducible.

Mobile internet usage patterns and network availability (4G/5G)

Reported 4G LTE and 5G availability

  • FCC Broadband Data Collection (BDC): The FCC publishes provider-reported mobile broadband availability by technology (including LTE and 5G variants) in a map-based interface and downloadable data. This is the primary public source for distinguishing where service is reported available within Grundy County from whether households subscribe. Source: FCC National Broadband Map.
  • Technology distinctions: The FCC map separates mobile broadband into categories that can include LTE and multiple forms of 5G (provider-reported). These categories indicate claimed service availability, not guaranteed indoor coverage or minimum user throughput at a specific address.

On-the-ground performance considerations (not adoption):

  • Population density and land use: Coverage and capacity generally track demand and infrastructure density. More consistent service is commonly reported in and near incorporated places and along major transportation corridors (e.g., I‑80), with more variability possible in less-dense areas.
  • Indoor vs. outdoor coverage: Provider-reported availability may reflect outdoor or in-vehicle service levels in some areas; indoor performance can differ due to building materials, tower distance, and spectrum band characteristics.

Mobile vs. fixed broadband role

  • Mobile as primary internet (“cellular-only”) is measurable in ACS at some geographies. Where available, it helps distinguish areas that have mobile access from areas that depend on mobile access. Source: ACS Internet Subscription tables.
  • Network availability does not imply substitution: Areas can show high reported mobile availability but still have low reliance on mobile-only internet due to fixed broadband availability and pricing.

Common device types (smartphones vs. other devices)

Public, county-specific device-type prevalence is not consistently available in a single definitive dataset. The most direct public indicators come from ACS household device questions (smartphone, tablet, computer), which can be used to compare:

  • Smartphone availability in households versus
  • Computer ownership (desktop/laptop) and
  • Tablet ownership

These metrics describe household device access, not individual device ownership, and do not measure usage intensity. Source: ACS tables on computers and internet use (data.census.gov).

Limitation: County-level estimates for specific device categories can have suppression or high margins of error, especially for detailed cross-tabs.

Demographic and geographic factors influencing mobile usage and connectivity

Settlement pattern and infrastructure economics (availability)

  • Concentration in towns and corridors: Morris and other incorporated communities, plus commercial/industrial areas near I‑80, tend to support denser network infrastructure due to higher traffic demand.
  • Lower-density areas: Outlying rural or semi-rural zones can experience greater variability in signal quality and capacity due to fewer cell sites per square mile.

Primary public source for assessing these differences spatially is the FCC’s availability mapping at fine geographic units. Source: FCC Broadband Map (mobile availability).

Demographics and adoption (household uptake and reliance)

  • Age and income: Nationally and in many communities, smartphone reliance and mobile-only internet are more common among younger adults and lower-income households, while fixed broadband adoption correlates with income and educational attainment. County-level confirmation requires survey estimates; ACS provides demographic context (age distribution, income, commuting patterns) for Grundy County that can be used alongside internet subscription indicators where statistically reliable. Source: Census QuickFacts and data.census.gov.
  • Commuting and daytime population shifts: Proximity to the Chicago region can affect daytime network load in corridor areas; publicly available network availability data does not quantify these load effects, and publicly available county-level mobile traffic statistics are generally not published.

Local and state broadband planning context

Illinois broadband planning resources may provide regional narratives, challenge processes, and program documentation that help interpret coverage reporting and infrastructure investment, while remaining distinct from adoption measurement. Source: Illinois Office of Broadband.

Data limitations and best public sources for Grundy County

This combination of sources supports a clear separation between where mobile service is reported available within Grundy County and the extent to which households adopt and rely on mobile service, while recognizing that standardized county-level “mobile penetration” figures are not consistently published in public datasets.

Social Media Trends

Grundy County is in northeastern Illinois, at the outer edge of the Chicago metropolitan area, with Morris as the county seat and Coal City and Minooka among its larger population centers. Its proximity to Interstate 80, a sizable share of commuting households, and a mix of industrial/logistics activity alongside fast-growing residential communities generally aligns the county’s digital-media behavior with broader suburban U.S. patterns rather than distinctly rural ones.

User statistics (penetration / active use)

  • County-specific social media penetration rates are not published reliably at the county level by major U.S. survey programs; the best defensible reference points are national and state-level surveys.
  • U.S. adults using social media: ~69% report using at least one social media site (Pew Research Center, 2023). Source: Pew Research Center report on U.S. social media use (2023).
  • U.S. adults using the internet (baseline for potential social media reach): ~93% (Pew, 2024). Source: Pew Research Center Internet/Broadband Fact Sheet.
  • Implication for Grundy County: As a suburban/exurban county in the Chicago region, usage is typically benchmarked against these national rates in the absence of methodologically consistent local estimates.

Age group trends

National age patterns are the most reliable proxy for age usage differences locally:

  • Highest use: Ages 18–29 (Pew reports consistently show the highest adoption and multi-platform use in this cohort). Source: Pew social media use details by age.
  • Middle: Ages 30–49 (high overall usage; strong Facebook, Instagram, YouTube; increasing TikTok use compared with older adults).
  • Lower but substantial: Ages 50–64 (still majority usage; more Facebook and YouTube than newer platforms).
  • Lowest: Ages 65+ (lowest overall social use, though Facebook and YouTube remain common).

Gender breakdown

  • Overall social media use: Pew finds men and women report similar overall social media usage rates, with platform-level differences more pronounced than overall participation. Source: Pew platform-by-platform demographics.
  • Typical platform skews (U.S. patterns):
    • Pinterest skews more female
    • Reddit skews more male
    • Facebook/YouTube/Instagram are closer to parity compared with the above, though distributions vary by age and education.

Most-used platforms (with percentages where available)

Pew’s 2023 U.S. adult platform usage rates provide the most widely cited baseline:

Behavioral trends (engagement patterns and preferences)

  • Video-centric consumption dominates: YouTube’s reach (83% of U.S. adults) indicates broad cross-age adoption of video as a primary social content format, with TikTok reinforcing short-form video habits, especially among younger adults. Source: Pew platform usage (YouTube, TikTok).
  • Age-based platform segmentation:
    • Younger adults concentrate engagement on Instagram, TikTok, Snapchat, and also use YouTube heavily.
    • Older adults concentrate engagement on Facebook and YouTube, with lower adoption of TikTok/Snapchat.
  • “Utility” platforms remain important in suburban counties: Facebook Groups, local community pages, and marketplace-style interactions tend to be prominent in suburban/exurban areas for local news, events, school/community coordination, and buy/sell activity (a pattern widely documented in community social media research, though not measured as a county rate in Grundy).
  • Professional networking remains minority use but stable: LinkedIn (30%) tends to correlate with higher educational attainment and white-collar employment; exurban commuter populations often mirror metro-area norms. Source: Pew LinkedIn usage.

Family & Associates Records

Grundy County, Illinois maintains family and associate-related public records through county offices and the Illinois Department of Public Health (IDPH). Vital records typically include birth and death certificates; marriage records are recorded locally by the county clerk. Adoption records are generally handled through the courts and state agencies and are not part of routine public record access.

Public-facing databases commonly cover recorded land documents and related indexes; court case information may be available through the circuit clerk, with access levels varying by case type. Official county access points include the Grundy County Clerk (vital records and marriages), the Grundy County Circuit Clerk (court records), and the Grundy County Recorder (property and recorded document records). Some online search tools and forms are provided through these pages; certified copies generally require an application, identity verification, and applicable fees. In-person access is conducted at the relevant office during business hours.

Privacy restrictions apply to many family records. Illinois limits access to birth and death records to individuals with a direct and tangible interest, and adoption files are typically sealed except under authorized processes. Court records involving minors, sensitive family matters, or protective orders may be restricted or redacted under Illinois rules and court orders.

Marriage & Divorce Records

Record types maintained in Grundy County, Illinois

  • Marriage licenses and marriage records
    • Grundy County issues and maintains marriage license records created when a couple applies to marry in the county.
    • Certified copies are commonly available as marriage certificates (a certified extract of the marriage record) issued by the county clerk.
  • Divorce records (dissolution of marriage)
    • Divorce case files, judgments, and decrees are maintained as court records (civil/family law matters) in the circuit court.
  • Annulments (declaration of invalidity of marriage)
    • Annulment actions are maintained as court records in the circuit court, similar to divorce case files.

Where records are filed and how they are accessed

  • Marriage records (county-level vital record)

    • Filed/maintained by: Grundy County Clerk (the local registrar and custodian of marriage license records for marriages licensed in the county).
    • Access: Requests are typically made through the County Clerk’s office for certified copies or verifications, using the county’s published procedures and forms. Identification and fees are generally required for certified copies.
    • State-level access: Marriage information is also reported to the Illinois Department of Public Health (IDPH) as part of statewide vital records administration; the county remains the primary source for local certified copies.

  • Divorce and annulment records (court records)

    • Filed/maintained by: Grundy County Circuit Court Clerk (case docket, filings, and final orders such as judgments of dissolution or orders declaring a marriage invalid).
    • Access: Case indexes and docket information are accessed through the Circuit Clerk’s records systems and public access terminals/online access tools where available; copies of specific documents are requested from the Circuit Clerk and may involve copy/certification fees.
    • State-level access: IDPH maintains statewide divorce data for statistical purposes and issues “certificates of dissolution of marriage” (a verification product rather than a complete decree) under state vital records rules.

Typical information contained in the records

  • Marriage license / marriage record

    • Full names of the parties
    • Date and place of marriage (and/or license issuance date)
    • Ages or dates of birth (varies by form and time period)
    • Residence addresses and/or place of residence at time of application
    • Names of parents (often included on the application in many Illinois time periods)
    • Officiant name/title and certification that the marriage was solemnized
    • Witness information may appear depending on the form used
    • License number and filing information

  • Divorce (dissolution) case records

    • Case caption (names of parties), case number, filing date, and venue
    • Pleadings (petition/complaint, responses), motions, and notices
    • Orders entered during the case (temporary orders, continuances, etc.)
    • Judgment for dissolution of marriage / divorce decree: date of judgment, findings, and terms of relief
    • Provisions on property division, maintenance (spousal support), child support, parental responsibilities/parenting time, and allocation of debts (when applicable)

  • Annulment (declaration of invalidity) case records

    • Case caption, case number, filing date, and court orders
    • Pleadings and supporting filings
    • Final order declaring the marriage invalid (and any associated relief regarding property, support, or children, when applicable)

Privacy and legal restrictions

  • Marriage records

    • Marriage records are treated as vital records. Access to certified copies is governed by Illinois vital records laws and administrative rules. County clerks commonly require identity documentation and fees for certified copies.
    • Public access to marriage records can vary by format (index/verification vs. certified copy) and by the office’s procedures for providing certified or non-certified copies.

  • Divorce and annulment court files

    • Court records are generally public, but access to specific documents can be limited by:
      • Sealed case files or sealed documents by court order
      • Statutory confidentiality rules for certain information (for example, protected personal identifiers)
      • Court rules requiring redaction of personal data (such as Social Security numbers and some financial account information) from documents made publicly available
      • Cases involving minors or sensitive matters may have additional restrictions on disclosure of particular filings
    • Certified copies of final judgments and orders are obtained through the Circuit Clerk and may be subject to court-record certification rules and fees.

Education, Employment and Housing

Grundy County is in northeastern Illinois, southwest of Chicago, anchored by Morris (the county seat) and communities along the Interstate 80 corridor. The county is part of the broader Chicago region labor market but retains a mix of small-city, exurban, and rural settlement patterns. Population size and several detailed indicators vary by data source vintage (U.S. Census Bureau ACS vs. Illinois administrative reporting), so figures below are presented using the most recent commonly published county-level releases, with noted limits where school- or district-level figures are not published in a single countywide table.

Education Indicators

Public schools (count and names)

Public K–12 education in Grundy County is delivered primarily through multiple independent school districts (elementary, high school, and unit districts). A single, authoritative countywide “school list” is not typically published as a consolidated dataset; the most complete public directory is maintained by the Illinois State Board of Education (ISBE). The county’s public schools and districts can be verified through the ISBE directory and report card system (district and school profiles): Illinois Report Card (ISBE).
Proxy note: Because the county is served by multiple districts whose boundaries cross municipal and township lines, counts and school names are best drawn directly from the ISBE Report Card search results for the most current year rather than static lists.

Student–teacher ratios and graduation rates

  • Student–teacher ratios: Reported at the district and school level in the ISBE Report Card rather than as a single county aggregate. Ratios vary by district type (elementary vs. high school) and community size; countywide rollups are not consistently published as an official metric.
  • Graduation rates: Four-year high school graduation rates are also reported at the high school/district level through ISBE. Grundy County is served by more than one high school district/unit district, so the most accurate “county profile” is a set of district graduation rates rather than a single county average. Source: Illinois Report Card (graduation rate by high school/district).

Adult educational attainment

Countywide adult attainment is available from the U.S. Census Bureau’s American Community Survey (ACS) and typically summarized on Census county profiles:

  • High school graduate or higher (age 25+): Reported via ACS (county estimate).
  • Bachelor’s degree or higher (age 25+): Reported via ACS (county estimate).
    Source: U.S. Census Bureau data.census.gov (ACS educational attainment).
    Data note: ACS margins of error can be material in smaller counties; multi-year ACS estimates are commonly used for stability.

Notable programs (STEM, vocational, AP)

Program availability is primarily district-specific:

  • Advanced Placement (AP), dual credit, and career/technical education (CTE): Typically reported in high school course/program sections and outcomes on ISBE district/school profiles, and often supplemented by local district curriculum guides.
  • Vocational/CTE pathways: Many Illinois high schools participate in regional CTE networks and dual-credit arrangements with community colleges; confirmation for Grundy County-serving districts is best sourced from each district’s ISBE profile and published course catalogs.
    Source reference point: ISBE Illinois Report Card (program/course indicators where reported).

School safety measures and counseling resources

Illinois public schools commonly report safety and student-support staffing through a combination of:

  • ISBE Report Card staffing and climate indicators (where available by district/school), and
  • Required state and federal postings (e.g., student services staffing categories, disciplinary incident reporting frameworks).
    Because specific safety protocols (secure entry, SRO presence, drills, threat assessment teams) and counseling models (counselor-to-student ratios, social work services) differ by district and building, the most defensible county summary is that these measures are implemented and disclosed at the district/school level, with published indicators accessible through: ISBE school/district profiles.
    Proxy note: A single countywide inventory of safety hardware/procedures is not maintained as a standardized public dataset; district board policies and school handbooks provide the operational detail.

Employment and Economic Conditions

Unemployment rate (most recent available)

The most current official unemployment rates are published monthly and annually by the U.S. Bureau of Labor Statistics (BLS) Local Area Unemployment Statistics (LAUS), often mirrored by state labor market dashboards.

Major industries and employment sectors

County sector composition is typically summarized in ACS “industry by occupation” tables and in regional labor market analyses. In the I‑80 corridor and Chicago exurban context, major sectors commonly include:

  • Manufacturing
  • Transportation and warehousing / logistics
  • Construction
  • Retail trade and accommodation/food services
  • Health care and social assistance
  • Educational services and public administration
    Primary source for county sector shares: ACS industry profiles on data.census.gov. Supplemental employer/industry concentration data are also commonly available via regional economic development reports and state labor market information portals (not always county-exhaustive).

Common occupations and workforce breakdown

ACS provides county estimates for occupational groups, generally including:

  • Management, business, science, and arts
  • Service occupations
  • Sales and office
  • Natural resources, construction, and maintenance
  • Production, transportation, and material moving
    Source: ACS occupation tables (county).
    Context note: The county’s proximity to major freight routes typically supports an above-metro-average share of transportation/material-moving and production roles, while professional/managerial employment is influenced by commuting ties to the Chicago region.

Commuting patterns and mean commute time

  • Mean travel time to work: Published by ACS for counties.
  • Commuting mode split: ACS reports drive-alone, carpool, transit, walk, bicycle, and work-from-home shares.
    Source: ACS commuting characteristics (travel time and means of transportation).
    Regional proxy: Exurban Chicago-area counties typically show high drive-alone shares and longer-than-state-average commute times due to cross-county travel to employment centers; Grundy County’s I‑80 access supports car-oriented commuting patterns.

Local employment vs. out-of-county work

ACS “county-to-county worker flow” is not directly published as a simple county statistic in standard ACS tables, but several public products provide insight:

  • ACS place-of-work and commuting tables indicate the share working inside vs. outside the county when available in county profiles.
  • The U.S. Census Bureau’s Longitudinal Employer-Household Dynamics (LEHD) Origin-Destination Employment Statistics (LODES) provide detailed inflow/outflow commuting patterns.
    Sources: ACS commuting/place-of-work tables and LEHD/LODES (inflow/outflow commuting).
    Context note: As part of the Chicago regional labor shed, Grundy County typically exhibits a meaningful share of residents working out-of-county (including adjacent collar counties and the Chicago metro employment core), while local jobs concentrate in county seat services, education, health care, construction, manufacturing, and logistics.

Housing and Real Estate

Homeownership rate and rental share

  • Owner-occupied vs. renter-occupied housing: Published by ACS for counties (housing tenure).
    Source: ACS housing tenure (homeownership rate).
    Context note: Exurban/rural counties in northeastern Illinois commonly have higher homeownership than the City of Chicago and inner suburbs, reflecting larger-lot single-family housing stock.

Median property values and recent trends

  • Median value of owner-occupied housing units: Published by ACS for counties and updated annually (with multi-year estimates commonly referenced).
  • Trend context: County median values typically track regional interest rates, Chicago-metro demand spillover, and new construction patterns near highway access.
    Source: ACS median home value (county).
    Proxy note: Transaction-based “recent trend” measures (year-over-year sales price changes) are usually sourced from MLS/industry data, which are not uniformly open at county level; ACS provides a consistent public series for broad trend direction but is survey-based.

Typical rent prices

  • Median gross rent: Published by ACS for counties.
    Source: ACS median gross rent (county).
    Housing-market note: Rents vary substantially by proximity to Morris and other incorporated areas, unit type (single-family rentals vs. multifamily), and access to I‑80 employment nodes.

Types of housing

Grundy County’s housing stock typically includes:

  • Single-family detached homes (dominant in many exurban and rural areas)
  • Low-rise apartments and duplexes in incorporated communities (e.g., around local downtowns and highway-accessible corridors)
  • Rural lots and farm-adjacent residences in unincorporated areas
    Countywide unit-type shares are available in ACS “structure type” tables. Source: ACS housing structure type (county).

Neighborhood characteristics (proximity to schools or amenities)

Neighborhood accessibility characteristics are not standardized as a single county metric; typical patterns include:

  • Morris-area neighborhoods with closer proximity to schools, civic services, retail, and health services.
  • I‑80 corridor areas with stronger access to logistics/industrial employment and regional commuting routes.
  • Unincorporated/rural areas with larger parcels, lower density, and longer drive times to schools and amenities.
    Proxy note: Walkability and amenity proximity are more often captured via city-level planning documents and private mapping indices rather than countywide official statistics.

Property tax overview (rate and typical cost)

Illinois property taxes are administered locally and vary by taxing district; countywide “average rate” can be approximated using equalized assessed value (EAV) and extensions, but homeowner experience depends on location, exemptions, and assessment.

  • Effective property tax rates and median tax bills are commonly summarized in county profiles by the Illinois Department of Revenue and in housing datasets that combine assessment and levy information.
    Reference sources: Illinois Department of Revenue (property tax information) and the local county clerk/treasurer reporting for levy and billing details (published locally).
    Data note: A single definitive “typical homeowner cost” for the county requires specifying home value and taxing district; published medians or effective rates (where available) provide the most comparable summary measure across areas.

Table of Contents

Other Counties in Illinois