Plymouth County, Iowa

Plymouth County is a county in Iowa with an estimated population of 25,722 in 2023. 6 cities, towns and Census places in it are indexed here.

Largest places in Plymouth County

About Plymouth County

Plymouth County is one of the counties of Iowa. County governments in Iowa handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.