Missouri Counties
Complete list of all 115 counties in Missouri with population, area, median income, and county seats — plus a free printable blank map.
Labeled outline map of Missouri counties. Download a printable version in SVG, PNG, or PDF.
All 115 Missouri counties
| County | County Seat | Population ▼ | Area | Median Income | Cities |
|---|---|---|---|---|---|
| St. Louis | — | 1,028,683 | 62 mi² | $93,939 | 13 |
| Jackson | — | 725,261 | 604 mi² | $73,977 | 12 |
| St. Charles | — | 416,486 | 560 mi² | $107,064 | 13 |
| Greene | — | 314,628 | 675 mi² | $64,653 | 11 |
| St. Louis | — | 279,896 | 62 mi² | $56,569 | 1 |
| Clay | — | 265,074 | 397 mi² | $92,896 | 8 |
| Jefferson | — | 199,561 | 657 mi² | $83,058 | 18 |
| Boone | — | 181,068 | 685 mi² | $71,260 | 7 |
| Franklin | — | 114,137 | 923 mi² | $75,807 | 20 |
| Platte | — | 108,768 | 420 mi² | $96,950 | 9 |
| Cass | — | 107,789 | 697 mi² | $88,391 | 13 |
| Jasper | — | 105,395 | 638 mi² | $63,297 | 15 |
| Christian | — | 93,414 | 563 mi² | $82,325 | 14 |
| Cape Girardeau | — | 81,408 | 579 mi² | $68,755 | 12 |
| Newton | — | 78,429 | 625 mi² | $62,803 | 10 |
How many counties does Missouri have?
Missouri has 115 counties covering 68,742 square miles and roughly 6,191,989 residents. The state was admitted to the Union in 1821 as the 24th state, and the current county boundaries reflect more than a century of administrative subdivision.
The largest county by land area is Texas County at 1,177 square miles, home to about 23,963 residents. The most populous is St. Louis County with approximately 1,028,683 residents — a density of about 16,592 people per square mile.
At the other end of the scale, Worth County has only about 1,915 residents.
Missouri’s capital is Jefferson City, while the largest city is Kansas City — a common pattern in the United States, where many states placed their capitals in smaller, more central towns rather than their largest commercial hubs.
Related resources
Download a printable outline of Missouri’s county boundaries from our blank map of Missouri page — available in SVG, PNG, and PDF.
Use the What County Am I In? tool to detect which Missouri county a GPS location or address falls in, or the Address to County Lookup for batch input.
For demographic radius analysis, the Find ZIP Codes in Radius and Population Within Radius tools let you draw a circle around any Missouri address and see every ZIP code and the total population inside.
Two SimpleMapLab studies cover Missouri specifically: the 100-mile radius around Jefferson City measures how much of the state lives within 100 miles of its capitol, and the loneliest town in Missouri ranks the state’s most isolated inhabited place. The county-counts blog post puts Missouri’s 115 counties in national context.
Frequently asked questions
Population and demographics are aggregated from ZIP-code-level US Census data via the SimpleMaps dataset. Countiesboundaries are from the US Atlas TopoJSON build of the Census Bureau’s TIGER/Line shapefiles. Land area is from the Census Gazetteer. State counts follow the US Census Bureau’s definition of counties and county-equivalents (50 states + DC = 3,143). All sources are public domain.