Keokuk County is a county located in the U.S. state of Iowa. As of the 2020 United States Census, the population was 10,033. The county seat is Sigourney.

Sigourney is a city in Keokuk County, Iowa, United States. The population was 2,004 at the time of the 2020 census. It is the county seat of Keokuk County. Keokuk County Courthouse is located in the Public Square Historic District. Both are on the National Register of Historic Places.