Springfield is a city in and the county seat of Clark County, Ohio, United States. The municipality is located in southwestern Ohio and is situated on the Mad River, Buck Creek, and Beaver Creek, about 45 miles (72 km) west of Columbus and 25 miles (40 km) northeast of Dayton. As of the 2020 census, the city had a total population of 58,662, while the Springfield metropolitan area had a population of 136,001 residents. Springfield is home to Wittenberg University, a liberal arts college. The Little Miami Scenic Trail, a paved rail-trail that is nearly 80 miles long, extends from the Buck Creek Scenic Trail head in Springfield south to Newtown, Ohio. Buck Creek State Park and its Clarence J. Brown reservoir are located at the city limits.