Air Warning Squadron 4 (AWS-4) was a United States Marine Corps aviation command and control squadron during World War II. The squadron's primary mission was to provide aerial surveillance and early warning of approaching enemy aircraft during amphibious assaults. The squadron participated in the Philippines campaign (1944–1945) in support of the Eighth Army on Mindanao. AWS-4 was decommissioned shortly after the war in October 1945. To date, no other Marine Corps squadron has carried the lineage and honors of AWS-4 to include Marine Air Control Squadron 4 (MACS-4).