315th may refer to:
315th (Kirkcudbright) Field Battery, Royal Artillery (RA) unit of Britain's part-time Territorial Army (TA) during World War II 315th (North Midland) Medium Regiment, Royal Artillery, part-time unit of Britain's Royal Artillery (RA), raised before the outbreak of World War II 315th Air Division, inactive United States Air Force formation 315th Airlift Wing, wing of the United States Air Force Reserve 315th Bombardment Squadron, United States Space Force's space domain awareness delta, headquartered at Peterson Space Force Base, Colorado 315th Cavalry Regiment (United States), cavalry unit of the United States Army during World War I and the interwar period 315th Cyberspace Operations Squadron, cyberspace warfare unit located at Fort George G. Meade, Maryland 315th Engineer Battalion, multi-role engineer battalion of the United States Army based in Camp Pendleton, California 315th Fighter Squadron, active squadron of the United States Air Force 315th Operations Group, United States Air Force Reserve unit assigned to the 315th Airlift Wing 315th Polish "Deblinski" Fighter Squadron, one of several Polish squadrons in the Royal Air Force (RAF) during the Second World War 315th Rifle Division (Soviet Union), standard Red Army rifle division formed in 1942 in the Siberian Military District 315th Troop Carrier Squadron, inactive United States Air Force unit 315th Weapons Squadron, United States Air Force unit, assigned to the USAF Weapons School at Nellis Air Force Base, Nevada
See also 315 (number) 315, the year 315 (CCCXV) of the Julian calendar 315 BC