One of 99 counties in Iowa, United States. County seat: Greenfield.
One of 77 counties in Oklahoma, United States. County seat: Stilwell. Named after the Adair family of the Cherokee tribe.
One of 120 counties in Kentucky, United States. County seat: Columbia.
One of 114 counties in Missouri, United States. County seat: Kirksville.
One of 88 counties in Ohio, United States. County seat: Mansfield.
One of 46 counties in South Carolina, United States. County seat: Columbia.
One of 56 counties in Montana, United States. County seat: Sidney.
One of 53 counties in North Dakota, United States. County seat: Wahpeton. Named after Morgan T. Rich.
One of 72 counties in Wisconsin, United States. County seat: Richland Center.
One of 102 counties in Illinois, United States. County seat: Olney.