Marysville is a city located in Union County, Ohio, in the United States. It serves as the county seat and is situated approximately 27 miles northwest of Columbus. As of the 2020 census, the city had a population of 25,571.
The city functions as a suburb and has utilized the slogan "Where the Grass is Greener" for a long period. In 2008, Marysville was designated as a Preserve America Community by U.S. First Lady Laura Bush.