Albia is a city in and the county seat of Monroe County, in southern Iowa, United States. The population was 3,721 at the 2020 census. Albia is located at the junction of U.S. Route 34 and Iowa Highways 137 and 5. The city of Albia and the surrounding area was a past center for coal mining in Iowa, and is now known for its historic square, and collection of Victorian, Tudor, Gothic, and Italianate homes.