VPB-121 was a Patrol Bombing Squadron of the U.S. Navy. The squadron was established as Patrol Squadron 19 (VP-19) on 1 October 1937, redesignated Patrol Squadron 43 (VP-43) on 1 July 1939, redesignated Patrol Squadron 81 (VP-81) on 1 July 1941, redesignated Patrol Bombing Squadron 121 (VPB-121) on 1 October 1944 and disestablished on 1 June 1946.

The Consolidated P2Y was an American flying boat maritime patrol aircraft. The plane was a parasol monoplane with a fabric-covered wing and aluminum hull. The aircraft was also made by Martin as the P3M, due to an open production contract.