Military units of Clark Air Base consisted primarily of United States Army and United States Air Force organizations.
Major units assigned
Pre World War II (1919–1940) 3d Aero Squadron (Observation)*, 2 December 1919 – 14 May 1921 Redesignated 3d Squadron*, 14 May 1921 – 25 January 1923 Redesignated 3d Pursuit Squadron*, 25 January 1923 – 16 June 1938 28th Squadron (Bomb), 1 September 1922 – 4 June 1923 28th Bombardment Squadron*, 16 June 1938 – 24 December 1941
World War II (1941) Philippine Department Air Force (September – October 1941)Redesignated Far East Air Force (28 October – 24 December 1941) V Bomber Command, 14 November – 24 December 1941 20th Pursuit Squadron, July – December 1941 (P-40B) 14th Bombardment Squadron 16 September 1941 – 1 January 1942 (B-17) 24th Pursuit Group, 1 October – 20 December 1941 (P-40B) 19th Bombardment Group, 26 October – 24 December 1941 (B-17) 30th Bombardment Squadron 23 October – 20 December 1941 (B-17) 93d Bombardment Squadron 23 October – 20 December 1941 (B-17)
World War II (1945) Advance Echelon, Headquarters, Fifth Air Force*, 10 February – 1 April 1945 Redesignated Fifth Air Force 1 April – 30 June 1945 V Bomber Command, – 4 March August 1945 V Fighter Command, – 4 March August 1945 Headquarters, 13th Air Force, 1 January – 20 May 1946 475th Fighter Group, 28 February – 20 April 1945 (P-38) 22d Bombardment Group, 12 March – 4 August 1945 (B-24) 43d Bombardment Group, 16 March – 26 July 1945 (B-24) 317th Troop Carrier Group, 17 March – 24 August 1945 91st Reconnaissance Wing, 24 March – 30 July 1945 421st Night Fighter Squadron, 26 April – 5 August 1945 433d Troop Carrier Group, 31 May – 11 September 1945 35th Fighter Group, 19 April – 28 June 1945 (P-51D) 421st Night Fighter Squadron, 26 April 1945 – 16 July 1945 (P-61) 312th Bombardment Group, May–August 1945 (B-32) 6th Reconnaissance Group, 1 May – 31 July 1945 345th Bombardment Group, 12 May – 25 July 1945 54th Troop Carrier Wing, June–September 1945 (C-47) 201st Mexican Fighter Squadron, June–September 1945 (P-47D) 419th Night Fighter Squadron 10 January 1946 – 7 May 1946 (P-61) US Navy Fleet Air Wing Seventeen, 26 February – 31 December 1945(Disestablished in Japan, 2 January 1945) Patrol Bombing Squadron VPB-104 (PB4Y-1 Liberators), 1 March – 25 October 1945 Patrol Bombing Squadron VPB-119 (PB4Y-2 Privateers), 2 March – 30 October 1945 ACORN-34 : CBMU 606 / CASU 57 / CASU 9.1 310th Bombardment Wing, 23 August – 21 October 1945
Postwar Years (1946–1949) 29th Air Service Group*, 16 February 1946 – 1 January 1947 Headquarters, 313th Bombardment Wing 15 March 1946 – 15 June 1948 6th Bombardment Group (VH) 28 January 1946 – 1 June 1947 (B-29) 504th Bombardment Group (VH) 6 March – 15 June 1946 (B-29) 505th Bombardment Group (VH) 14 March – 30 June 1946 (B-29) 9th Bombardment Group (VH) 15 April 1946 – 9 June 1947 (B-29) 358th Air Service Group*, 1 January 1947 – 1 July 1949 18th Fighter Wing 16 September 1947 – 1 December 1950 (P/F-47, P/F-51, RB-17G, RB-29 (F-2)) Headquarters, 13th Air Force, 1 May 1949 – 2 December 1991 24th Air Depot Wing*, 1 July 1949 – 1 December 1950 6204th Photo Mapping Squadron, 16 September 1949 – 1 June 1953 6208th Depot Wing 17 December 1949 – 1 September 1952