Harlan is a city in Shelby County, Iowa, along the West Nishnabotna River. The population was 4,893 at the time of the 2020 census. It is the county seat of Shelby County.

Shelby County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 11,746. The county seat is Harlan. Its name is in honor of Isaac Shelby, the first Governor of Kentucky.