373rd

373rd or 373d may refer to:


 * 373d Fighter Group, inactive United States Army Air Force unit
 * 373d Intelligence, Surveillance and Reconnaissance Group (ISRG), an Air Force Intelligence, Surveillance and Reconnaissance Agency unit located at Misawa AB, Japan
 * 373d Strategic Missile Squadron, inactive United States Air Force unit
 * 373rd (Croatian) Infantry Division (Wehrmacht), a division of the German Army during World War II