427th may refer to: 427th Aircraft Sustainment Group, inactive United States Air Force unit 427th Air Refueling Squadron, inactive United States Air Force unit 427th Bombardment Squadron, active United States Air Force unit 427th (Durham) Coast Regiment, Royal Artillery 427th (East Lancashire) Field Company, Royal Engineers 427th Maryland General Assembly, convened in a regular session on January 13, 2010 427th Reconnaissance Squadron, active United States Air Force unit 427th Special Operations Squadron (427th SOS), direct reporting unit of the Air Force Special Operations Command
See also 427 (number) 427, the year 427 (CDXXVII) of the Julian calendar 427 BC