254th

254th may refer to:


 * 254th (City of London) Regiment, Royal Artillery, volunteer field artillery unit of the British Army between 1863 and 1971
 * 254th Battalion (Quinte's Own), CEF, unit in the Canadian Expeditionary Force during the First World War
 * 254th Combat Communications Group (254 CCG) a unit of the Texas Air National Guard located at Hensley Field, Dallas, Texas
 * 254th Fighter Aviation Regiment, aviation regiment established in 1944 as 1st Yugoslav Fighter Regiment
 * 254th Indian Tank Brigade, armoured brigade of the Indian Army during World War II
 * 254 (East of England) Medical Regiment, Royal Army Medical Corps, regiment of the British Army Reserve
 * 254th Motor Rifle Division, motorized infantry division of the Soviet Army during the Cold War and later the Ukrainian Army
 * 254th pope or Pope Gregory XVI (1765–1846), born Bartolomeo Alberto Cappellari, became pope on 2 February 1831
 * 254th Tunnelling Company, one of the tunnelling companies of the Royal Engineers created by the British Army during World War I
 * Riverdale-West 254th Street station, commuter rail stop on the Metro-North Railroad's Hudson Line