Patrol Squadron 46 (VP-46), also known as the "Grey Knights", is a maritime patrol squadron of the United States Navy based at Naval Air Station Whidbey Island, Washington. Part of Patrol and Reconnaissance Wing Ten, VP-46 is the oldest maritime patrol squadron and the second oldest aircraft squadron in the entire U.S. Navy, second only behind VFA-14.

The squadron was originally established as Patrol Squadron 5-S (VP-5S) on 1 July 1931, redesignated Patrol Squadron 5-F (VP-5F) on 1 April 1933, redesignated Patrol Squadron 5 (VP-5) on 1 October 1937, redesignated Patrol Squadron 33 (VP-33) on 1 July 1939, redesignated Patrol Squadron 32 (VP-32) on 1 October 1941, redesignated Patrol Bombing Squadron 32 (VPB-32) on 1 October 1944, redesignated Patrol Squadron 32 (VP-32) on 15 May 1946, redesignated Medium Patrol Squadron (Seaplane) 6 (VP-MS-6) on 15 November 1946 and redesignated Patrol Squadron 46 (VP-46) on 1 September 1948.

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.