A county of Missouri, United States. County seat: Montgomery City.

A county of Tennessee, United States. County seat: Clarksville.

A county of Texas, United States. County seat: Conroe.

A county of Alabama, United States. County seat: Huntsville. / A county of Arkansas, United States. County seat: Huntsville. / A county of Florida, United States. County seat: Madison.

A county of Virginia, United States. County seat: Madison.

One of 95 counties in Virginia, United States. County seat: Buckingham.

One of 64 counties in Colorado, United States. County seat: Greeley.

One of 99 counties in Iowa, United States. County seat: Toledo.

One of 102 counties in Illinois, United States. County seat: Kankakee.

One of 254 counties in Texas, United States. County seat: McKinney. Named after Collin McKinney; the county seat is also named after him.