Missouri County Maps
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Missouri has 115 counties, a population of more than 6 million people, about 1,035 zip codes and 732 public school districts. Those counties vary widely in population, school enrollment, zip code coverage and local boundary structure. St. Louis County has the largest population in the state, while Worth County has the smallest. Browse the map, population, zip codes, school districts, subdivisions and county list sections below to explore further. Or, simply start typing in the box below to go directly to that county.
Interactive Missouri County Map
This Missouri county map preview highlights population-by-county context, ZIP code coverage, school districts, and local boundary structure. Full statewide and county-level data packages are available when you need complete downloadable datasets. Click or tap any county to view its maps, trends and data.
Start with a free preview, or go straight to the full Missouri dataset .
Missouri Population By County
Missouri's population was over 6 million in 2020, up 185,833 (3.27%) residents from 2010. St. Louis County had the largest population in the state with more than 1 million people. Jackson and St. Charles Counties also stand out as major population centers. Worth County was the least populated area in Missouri with only 1,973 residents. The table below compares Missouri county populations and recent population trends.
The Most Populated Counties In Missouri
| County | Population | Trend (2010-2020) |
|---|---|---|
| St. Louis County | 1,004,125 | ▴ 0.52% |
| Jackson County | 717,204 | ▴ 6.39% |
| St. Charles County | 405,262 | ▴ 12.42% |
| Greene County | 298,915 | ▴ 8.63% |
| Clay County | 253,335 | ▴ 14.15% |
| Download all county population data | ||
County populations reflect the latest state serving context (2020).
Missouri County Map With ZIP Codes
Missouri has about 1,035 zip codes statewide. Jackson County contains the most zip codes, with 56. County-level zip code maps give a faster and clearer way to understand local coverage as zip boundaries can span county and municipal lines. The maps below highlight a few Missouri counties.
Missouri School Districts By County
Missouri has 732 public school districts with 1,174,617 students enrolled as of 2024. St. Louis County stands out for both district count and total enrollment. Greene County posted the largest recent enrollment gain. The table below compares county level school district totals and recent enrollment trends across the state.
Largest School Districts in Missouri
| County | Districts | Enrollment | Trend |
|---|---|---|---|
| St. Louis County | 23 | 133,589 | ▾ 1.04% |
| Johnson County | 13 | 14,190 | ▴ 0.17% |
| Jackson County | 12 | 91,705 | ▾ 0.81% |
| Jefferson County | 12 | 58,161 | ▴ 0.55% |
| Cass County | 12 | 36,728 | ▾ 0.29% |
| Download all school district data | |||
School district enrollment and trend values reflect the most recent state-level context (2024).
Missouri County Map With Subdivisions
Missouri has about 1,394 local subdivisions statewide. These boundaries add another layer of detail within counties and help show how local subdivision lines fit inside county boundaries. The previews below highlight a few Missouri counties with subdivision map coverage.
Get the Full Missouri Data Package
The sections above provide a preview of Missouri county maps and county-level data. The full package includes complete statewide coverage with ready-to-use files for mapping, planning, and analysis.
Everything is organized to save hours of data collection, cleanup, and integration work.
- County map exports and boundary coverage for every county in Missouri
- Statewide GIS layers for ZIP codes, subdivisions, school districts, roads, water, and political boundaries
- Population, demographics, school, housing, and trend context aligned across counties
- Database files, map-ready exports, and documentation designed for faster research workflows
Includes GIS layers, maps, demographics, analytics, database files and planning tools.