Ashland is a city in and the county seat of Ashland County, Ohio, United States,. The population was 19,225 at the 2020 census. It is the cent…Ashland is a city in and the county seat of Ashland County, Ohio, United States,. The population was 19,225 at the 2020 census. It is the center of the Ashland Micropolitan statistical area, which includes all of Ashland County.