Interstate 70 (I-70) in the US state of Ohio provides access between Indiana and West Virginia. I-70 is a major highway for traffic within, to, from, and through Ohio. The highway is a core roadway of the Columbus metropolitan area and is of additional importance in the Dayton metropolitan area.

The Columbus, Ohio metropolitan area is a metropolitan area in Central Ohio surrounding the state capital of Columbus. As defined by the U.S. Census Bureau, it includes the counties of Delaware, Fairfield, Franklin, Hocking, Licking, Madison, Morrow, Perry, Pickaway, and Union. At the 2020 census, the MSA had a population of 2,138,926, making it 32nd-most populous in the United States and the second largest in Ohio, behind the Cincinnati metropolitan area. The metro area, also known as Central Ohio or Greater Columbus, is one of the largest and fastest-growing metropolitan areas in the Midwestern United States.