Fort Leavenworth, KS

ZIP code 66027 belongs to a small town in Leavenworth County, Kansas. Known as Fort Leavenworth, this area is home to the United States Army's oldest active duty installation. The town is also famous for being the location of the United States Disciplinary Barracks, the only maximum-security correctional facility within the Department of Defense. Fort Leavenworth National Cemetery is another important landmark in the area.