Leavenworth Avenue is a fairly long street in Northern Gardens, Bohan. It starts just before where the Northern Expressway starts, heads south, passing the Bohan Medical & Dental Center and the Northern Gardens LCPD Station, continues south and makes a U-turn and heads north, through Industrial Bohan and its branch of Burger Shot and it stops. It becomes Lompoc Avenue.
- GTA IV and TLAD - The both simultaneous missions Hostile Negotiation and Roman's Holiday take place here, in GTA IV, Niko start his rescue for Roman and meanwhile in TLAD, Johnny and Malc kidnap Roman and take him to the building where Roman is later rescued.
- GTA TBOGT - One drug war takes place here.
- Much like other streets in Bohan, Leavenworth St is named after either the civilian penitentiary or the military penitentiary within the city limits of Leavenworth, Kansas.
- Being the north-south thoroughfare of eastern Bohan, its western counterpart is San Quentin Ave.