Grundy County GIS Maps
Grundy County, Missouri, has 9,808 residents and covers 435.3 square miles. The population declined 4.4% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Grundy County is 29079.
Trenton is the county's largest population center. Grundy County also includes 4 zip codes, 4 public school districts and 27 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Grundy County Trends
- Population
- 9,808▾
- Median Home Value
- $107,000▾
- K-12 Enrollment
- 1,583▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Grundy County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Grundy County Population
Grundy County had 9,808 residents in 2020. That was 4.4% lower than in 2010. Grundy County had 624 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 23 people per square mile. Some of the county's most populated postal areas include Trenton, Spickard and Galt.
Population Trend in Grundy County MO
Grundy County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Grundy County Zip Codes
Grundy County has 4 zip codes. Some of the county's most populated zip codes include Trenton (64683), Spickard (64679) and Galt (64641). Trenton is the largest zip by population, with about 7,900 residents or 81% of the county total. Together, the three largest zips account for about 94% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Grundy County MO
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 64683 | Trenton | 7,900 | ▾ -3% |
| 64679 | Spickard | 835 | ▴ 3.7% |
| 64641 | Galt | 521 | ▾ -21.8% |
| 64652 | Laredo | 372 | ▾ -15.6% |
| Download all zip code data | |||
Grundy County Zip Code populations and trends per most recent census data.
Grundy County Demographics
Grundy County has a median age of 39.7, which makes the county a little older than Missouri overall. About 25.6% of residents are under 18, while 21.7% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 26.9% of the population, which points to a solid working-age base. About 15.9% of adults have a bachelor's degree or higher, above the statewide figure of 31.9%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Grundy County MO
Median Age
39.7
Under 18
25.6%
Age 65+
21.7%
Bachelor's+
15.9%
Grundy County School Districts
Grundy County is served by 4 public school districts with 1,583 students enrolled in 2024. The largest districts on the county map are Trenton R-IX, Princeton R-V and Tri-County R-VII. Those three districts account for about 92% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Grundy County MO
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Trenton R-IX School District | 967 | 61.1% | ▾ -8.6% |
| Princeton R-V School District | 326 | 20.6% | ▾ -1.5% |
| Tri-County R-VII School District | 168 | 10.6% | ▾ -4% |
| Grundy County R-V School District | 122 | 7.7% | ▾ -10.9% |
| Download all school district data | |||
Grundy County school district enrollment and trends per most recent NCES reporting data.
Grundy County Housing & Real Estate
Grundy County has a median home value of $107,000 and a median gross rent of $679. About 69% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Missouri median, while rents come in below the state average. In March 2026, the median listing price was $169,900 and homes spent about 111 days on the market.
Grundy County Housing Mix
Grundy County housing mix: owner, renter and vacant units.
Grundy County Housing Trends
Grundy County median home value and rent trend (last 5 years).
Businesses in Grundy County, MO
Grundy County has 431 business listings across 204 categories. The largest categories in Grundy County business listings are Churches & Religious Organizations (20, 4.6%), Insurance Agencies (8, 1.9%), and Gas Stations (8, 1.9%). The full Grundy County business listings dataset includes names, categories, addresses and contact details where available. Grundy County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Grundy County, MO
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 20 | 4.6% |
| Insurance Agencies | 8 | 1.9% |
| Gas Stations | 8 | 1.9% |
| Beauty Salons | 8 | 1.9% |
| Pet Services | 7 | 1.6% |
| Lake | 7 | 1.6% |
| Community & Nonprofits | 7 | 1.6% |
| Banks & Credit Unions | 7 | 1.6% |
| Public And Government Association | 6 | 1.4% |
| Baptist Church | 6 | 1.4% |
Grundy County Business Listings
| Business | Category | City |
|---|---|---|
| Dynamic Tax and Accounting | Accountant | Trenton |
| Consumers Oil and Supply | Agricultural Cooperatives | Trenton |
| MFA Agri Services | Agricultural Service | Trenton |
| MU Thompson Research Farm | Agriculture | Spickard |
| Trenton Municipal Airport | Airport | Trenton |
| Uprooted Kitchen & Tap | American Restaurants | Trenton |
| Green Hills Animal Shelter | Animal Shelters | Trenton |
| Main Street Mall | Antique Store | Trenton |
| Klinginsmith's Home Center | Appliance Store | Trenton |
| National Guard Recruiter | Armed Forces Branch | Trenton |
| Download Grundy County business listings | ||
Grundy County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Grundy County Basemaps
Grundy County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Grundy County Data Package
This page shows a preview of what's included in the Grundy County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
One-time · instant download · 30-day refund guarantee · See full package details
Preview a Live Package Demo
See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Missouri — explore the full structure before you buy.
No email or download required. Opens in a preview window on this page.
Nearby Counties
Browse county data pages for the counties that border Grundy County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.