The Central Ohio Transit Authority is a public transit agency serving the Columbus metropolitan area, headquartered in Columbus, Ohio. It operates fixed-route buses, bus rapid transit, microtransit, and paratransit services.

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.