504th

504th may refer to:

• 504th Battlefield Surveillance Brigade (BfSB), located at Fort Hood, Texas
• 504th Bombardment Group (504th BG), a World War II United States Army Air Forces combat organization
• 504th Expeditionary Air Support Operations Group, active United States Air Force unit
• 504th Fighter Squadron or 137th Airlift Squadron flies the C-5 Galaxy and the C-17A Globemaster III
• 504th Infantry Regiment (United States), an airborne forces regiment of the US Army

See also

• 504 (number)
• 504, the year 504 (DIV) of the Julian calendar
• 504 BC