VP-40 was a Patrol Squadron of the U.S. Navy. The squadron was established as Patrol Squadron 55 (VP-55) on 1 August 1940, redesignated Patrol Squadron 74 (VP-74) on 1 July 1941, redesignated Patrol Bombing Squadron 74 (VPB-74) on 1 October 1944, redesignated Patrol Squadron 74 (VP-74) on 15 May 1946, redesignated Medium Patrol Squadron (Seaplane) 10 (VP-MS-10) on 15 November 1946, redesignated Patrol Squadron 40 (VP-40) on 1 September 1948 and disestablished on 25 January 1950.

The squadron was assigned the following aircraft, effective on the dates shown:

The squadron was assigned to these home ports, effective on the dates shown:

This article incorporates text from the public domain Dictionary of American Naval Aviation Squadrons.