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 and the largest city is Harlan. Its name is in honor of Isaac Shelby, the
Irwin, Iowa
…Irwin is a city in Shelby County, Iowa, United States, along the West Nishnabotna River. The population was 319 at the time of the 2020 census. The Western Town Lot Company established Irwin…