A county of Iowa, United States. County seat: Osceola.

A county of Mississippi, United States. County seat: Quitman.

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

(obsolete) Clark County, Washington.

A county of Georgia, United States. County seat: Springfield. / A county of Illinois, United States. County seat: Effingham.

One of 105 counties in Kansas, United States. County seat: Wellington. Named after Charles Sumner. / One of 95 counties in Tennessee, United States. County seat: Gallatin. Named after Jethro Sumner.

One of 99 counties in Iowa, United States. County seat: Marengo. Named after the Iowa River. / One of 72 counties in Wisconsin, United States. County seat: Dodgeville. Named after the Iowa tribe.

One of 92 counties in Indiana, United States. County seat: Columbia City. / One of 120 counties in Kentucky, United States. County seat: Williamsburg.

One of 23 counties in Maryland, United States. County seat: Cambridge. / One of 46 counties in South Carolina, United States. County seat: St. George.

One of 14 counties in Massachusetts, United States. County seat: Northampton. / One of 55 counties in West Virginia, United States. County seat: Romney.