Kimballton is a city in Audubon County, Iowa, United States. The population was 291 at the time of the 2020 census. Kimballton was fo…Kimballton is a city in Audubon County, Iowa, United States. The population was 291 at the time of the 2020 census. Kimballton was founded in 1883 when Hans Jensen Jorgensen opened a post office at the site. The town was officially established in 1888, and incorporated in 1908. The town is named for a railroad employee, Edward Kimball.