Marysville is a city in and the county seat of Union County, Ohio, United States approximately 27 mi NW of Columbus. The population was 22,094 at the 2010 census. This marks a 38.59% increase from 2000.
Marysville's longtime slogan is "Where the Grass is Greener".
In December 2008, Marysville was designated as a "Preserve America Community" by the First Lady Laura Bush.