Transit Authority of Northern Kentucky

The Transit Authority of Northern Kentucky is the public transit system serving the Northern Kentucky suburbs of Cincinnati, Ohio, located in Kenton County, Boone County and Campbell County. TANK was founded in 1973 when the privately funded Greenline Bus Company ceased operation, and voters in the three counties elected to publicly fund the transit system. ATE Management, founded by Greenline's owners, provided management. ATE and its successor First Transit provided management until 2010, when TANK became self-managed. In 2022, the system had a ridership of 1,738,000, or about 6,100 per weekday as of the fourth quarter of 2022.

Currently TANK operates a fleet of 100 fixed route buses and 25 demand response vehicles.While TANK's primary service area is the three Northern Kentucky counties, all TANK routes also connect with Downtown Cincinnati where riders can transfer to vehicles operated by the Southwest Ohio Regional Transit Authority if necessary.