The Transit Authority of Northern Kentucky (TANK) is the public transit system serving the Northern Kentucky suburbs of Cincinnati, Ohio, located in Kenton County, Boone County and Campbell County, United States. 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, the system had a ridership of , or about per weekday as of. 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. Although the two systems are separate, the TANK and SORTA work to make transfers between systems easy, and even sell a joint pass. A bus redesign took effect on January 31, 2021.

Fare structure

As of 2021, TANK charges $1.50 for all fixed route service. Students in kindergarten through 12th grade on school days riding to and from school only pay $1. TANK also has passes: a 30-day pass (unlimited) for $66. Several regional passes are offered, which are valid for unlimited rides on both TANK and Metro/Southwest Ohio Regional Transit Authority. One Day Metro/TANK for $5; 30-day Metro/TANK for $105.

Ridership

Routes

Former routes

Note that Route 8 Eastern Avenue was merged into Route 25 Alexandria on January 9, 2010; Route 25 was split on October 1, 2015, bringing this route back.

Current bus fleet