Audubon County is a county in the U.S. state of Iowa. As of the 2020 census, the population was 5,674, making it Iowa's third-least populous county. Its county seat is Audubon. The county was named after John James Audubon, the naturalist and artist.

Audubon is a city and the county seat in Audubon County, Iowa, United States. The population was 2,053 in the 2020 census, a decline from 2,382 in the 2000 census.