Oregon County GIS Maps
Oregon County, Missouri, has 8,635 residents and covers 789.8 square miles. The population declined 20.6% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Oregon County is 29149.
Thayer is the county's largest population center. Oregon County also includes 5 zip codes, 5 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.
Oregon County Trends
- Population
- 8,635▾
- Median Home Value
- $117,700▴
- K-12 Enrollment
- 2,187▾
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.
Oregon 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.
Oregon County Population
Oregon County had 8,635 residents in 2020. That was 20.6% lower than in 2010. Oregon County had 1,709 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 11 people per square mile. Some of the county's most populated postal areas include Thayer, Alton and Koshkonong.
Population Trend in Oregon County MO
Oregon County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Oregon County Zip Codes
Oregon County has 5 zip codes. Some of the county's most populated zip codes include Thayer (65791), Alton (65606) and Koshkonong (65692). Thayer is the largest zip by population, with about 4,085 residents or 47% of the county total. Together, the three largest zips account for about 89% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Oregon County MO
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 65791 | Thayer | 4,085 | ▾ -10.9% |
| 65606 | Alton | 2,662 | ▾ -26.3% |
| 65692 | Koshkonong | 965 | ▾ -27.6% |
| 65778 | Myrtle | 332 | ▾ -36.6% |
| 65690 | Thayer | 180 | ▾ -39.6% |
| Download all zip code data | |||
Oregon County Zip Code populations and trends per most recent census data.
Oregon County Demographics
Oregon County has a median age of 44.6, which makes the county a little older than Missouri overall. About 23.1% of residents are under 18, while 22.8% 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% of the population, which points to a solid working-age base. About 14.4% 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 Oregon County MO
Median Age
44.6
Under 18
23.1%
Age 65+
22.8%
Bachelor's+
14.4%
Oregon County School Districts
Oregon County is served by 5 public school districts with 2,187 students enrolled in 2024. The largest districts on the county map are Thayer R-II, Alton R-IV and Winona R-III. Those three districts account for about 82% 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 Oregon County MO
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Thayer R-II School District | 780 | 35.7% | ▴ 1.4% |
| Alton R-IV School District | 571 | 26.1% | ▾ -2.6% |
| Winona R-III School District | 437 | 20% | ▾ -0.7% |
| Oregon-Howell R-III School District | 213 | 9.7% | ▾ -8.2% |
| Couch R-I School District | 186 | 8.5% | ▴ 1.1% |
| Download all school district data | |||
Oregon County school district enrollment and trends per most recent NCES reporting data.
Oregon County Housing & Real Estate
Oregon County has a median home value of $117,700 and a median gross rent of $735. 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 Missouri median, while rents come in below the state average. In March 2026, the median listing price was $214,975 and homes spent about 87 days on the market.
Oregon County Housing Mix
Oregon County housing mix: owner, renter and vacant units.
Oregon County Housing Trends
Oregon County median home value and rent trend (last 5 years).
Businesses in Oregon County, MO
Oregon County has 420 business listings across 168 categories. The largest categories in Oregon County business listings are Structure And Geography (31, 7.4%), Churches & Religious Organizations (27, 6.4%), and River (23, 5.5%). The full Oregon County business listings dataset includes names, categories, addresses and contact details where available. Oregon County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Oregon County, MO
| Category | Businesses | Share |
|---|---|---|
| Structure And Geography | 31 | 7.4% |
| Churches & Religious Organizations | 27 | 6.4% |
| River | 23 | 5.5% |
| Auto Repair | 11 | 2.6% |
| Insurance Agencies | 10 | 2.4% |
| Beauty Salons | 10 | 2.4% |
| Auto Parts And Supply Store | 8 | 1.9% |
| Farm | 7 | 1.7% |
| Baptist Church | 6 | 1.4% |
| Medical Offices | 6 | 1.4% |
Oregon County Business Listings
| Business | Category | City |
|---|---|---|
| Penny Lane Accounting LLC | Accountant | Thayer |
| Hufstedler's Canoe Rental | Adventure Sports Center | Alton |
| Josh's ATV Repair | Advertising Agency | Alton |
| Hirsch Feed & Farm Supply | Agricultural Service | Thayer |
| Thayer Municipal Airport | Airport | Oregon County |
| Oregon County Ambulance | Ambulance And Ems Services | Thayer |
| Stateline Plaza Restaurant | American Restaurants | Mammoth Spring |
| Masters Ranch | Apartments | Couch |
| Shady Oaks Healthcare | Assisted Living Facility | Thayer |
| LibertyX Bitcoin ATM | ATMs | Thayer |
| Download Oregon County business listings | ||
Oregon County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Oregon County Basemaps
Oregon 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 Oregon County Data Package
This page shows a preview of what's included in the Oregon 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 Oregon County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.