Mercer County, Missouri
Mercer County sits along Missouri’s northern border with Iowa. Princeton, the county seat, is a small but welcoming community with a classic town square full of small-town charm.
This is true farm country, where corn fields and cattle operations dominate the landscape. Rolling prairies, red barns, and silver silos create a picture-perfect rural setting. Residents take pride in their strong work ethic and pioneer heritage.
Hunting season brings plenty of activity to the countryside, while summer is filled with baseball games and community ice cream socials. Winters can be long and cold, making the warmer months all the more appreciated in Mercer County.
| Category | Details |
|---|---|
| County Name | Mercer County |
| County Seat | Princeton |
| Cities, Towns, and Communities | Princeton, Mercer, South Lineville, Ravanna |
| Interstates and Highways | US 65, MO 136, MO 139 |
| Population | Approximately 3,500 |
| FIPS Code | 29-129 |
| Total Area (Land and Water) | 455 square miles (Land: 454 sq mi, Water: 1 sq mi) |
| Time Zone | Central Time Zone (CT) |
| State | Missouri |
| Coordinates | 40.4233° N, 93.5642° W |
| Etymology | Named after John Francis Mercer, an American lawyer, planter, and politician |
| Major Landmarks | Nine Eagles State Park, Princeton Courthouse Square, Mercer County Historical Museum |
| Adjacent Counties (and Direction) | Decatur County, Iowa (Northwest), Wayne County, Iowa (North), Putnam County (East), Sullivan County (Southeast), Grundy County (South), Harrison County (West) |
