Thomas County GIS Maps
Thomas County, Kansas, has 7,930 residents and covers 1,074.7 square miles. The population grew 0.4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Thomas County is 20193.
Colby is the county's largest population center. Thomas County also includes 5 zip codes, 6 public school districts and 32 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.
Thomas County Trends
- Population
- 7,930▴
- Median Home Value
- $165,900▴
- K-12 Enrollment
- 1,834▴
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.
Thomas 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.
Thomas County Population
Thomas County had 7,930 residents in 2020. That was 0.4% higher than in 2010. Thomas County had 250 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 7 people per square mile. Some of the county's most populated postal areas include Colby, Brewster and Rexford.
Population Trend in Thomas County KS
Thomas County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Thomas County Zip Codes
Thomas County has 5 zip codes. Some of the county's most populated zip codes include Colby (67701), Brewster (67732) and Rexford (67753). Colby is the largest zip by population, with about 6,561 residents or 83% of the county total. Together, the three largest zips account for about 95% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Thomas County KS
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 67701 | Colby | 6,561 | ▴ 0.9% |
| 67732 | Brewster | 528 | ▾ -2.8% |
| 67753 | Rexford | 472 | ▾ -10.9% |
| 67734 | Colby | 190 | ▴ 4.4% |
| 67743 | Brewster | 183 | ▴ 15.8% |
| Download all zip code data | |||
Thomas County Zip Code populations and trends per most recent census data.
Thomas County Demographics
Thomas County has a median age of 35.3, which makes the county a little younger than Kansas overall. About 24.2% of residents are under 18, while 17.9% 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 28.4% of the population, which points to a solid working-age base. About 30.2% of adults have a bachelor's degree or higher, above the statewide figure of 35.2%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Thomas County KS
Median Age
35.3
Under 18
24.2%
Age 65+
17.9%
Bachelor's+
30.2%
Thomas County School Districts
Thomas County is served by 6 public school districts with 1,834 students enrolled in 2024. The largest districts on the county map are Colby Public Schools Unified 315, Oakley Unified 274 and Golden Plains Unified 316. Those three districts account for about 86% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Thomas County KS
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Colby Public Schools Unified School District 315 | 958 | 52.2% | ▴ 1.5% |
| Oakley Unified School District 274 | 456 | 24.9% | ▴ 5.6% |
| Golden Plains Unified School District 316 | 158 | 8.6% | ▾ -0.6% |
| Brewster Unified School District 314 | 124 | 6.8% | ▴ 12.7% |
| Triplains Unified School District 275 | 73 | 4% | — 0% |
| Download all school district data | |||
Thomas County school district enrollment and trends per most recent NCES reporting data.
Thomas County Housing & Real Estate
Thomas County has a median home value of $165,900 and a median gross rent of $753. About 77% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Kansas median, while rents come in below the state average. In March 2026, the median listing price was $248,500 and homes spent about 50 days on the market.
Thomas County Housing Mix
Thomas County housing mix: owner, renter and vacant units.
Thomas County Housing Trends
Thomas County median home value and rent trend (last 5 years).
Businesses in Thomas County, KS
Thomas County has 560 business listings across 242 categories. The largest categories in Thomas County business listings are Churches & Religious Organizations (19, 3.4%), Gas Stations (15, 2.7%), and Auto Repair (12, 2.1%). The full Thomas County business listings dataset includes names, categories, addresses and contact details where available. Thomas County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Thomas County, KS
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 19 | 3.4% |
| Gas Stations | 15 | 2.7% |
| Auto Repair | 12 | 2.1% |
| Agricultural Service | 12 | 2.1% |
| Hotels | 9 | 1.6% |
| Public And Government Association | 8 | 1.4% |
| Industrial Equipment | 8 | 1.4% |
| Chiropractors | 7 | 1.3% |
| Hardware Stores | 7 | 1.3% |
| Insurance Agencies | 7 | 1.3% |
Thomas County Business Listings
| Business | Category | City |
|---|---|---|
| Colby Housing Authority | Accommodation | Colby |
| Precision Advising and Consulting | Accountant | Colby |
| LDI - Colby | Agricultural Service | Colby |
| Red River Commodities Inc | Agriculture | Colby |
| Colby Municipal Airport | Airport | Colby |
| Cap'n Jack's Pub | American Restaurants | Oakley |
| Whistle Stop RV & Antiques | Antique Store | Colby |
| Sears Hometown Store | Appliance Store | Colby |
| Western Appraisal Service | Appraisal Services | Colby |
| All Those Crafts | Arts And Crafts | Colby |
| Download Thomas County business listings | ||
Thomas County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Thomas County Basemaps
Thomas 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 Thomas County Data Package
This page shows a preview of what's included in the Thomas 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.
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Nearby Counties
Browse county data pages for the counties that border Thomas County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.