No. 5 Squadron RNZAF is a maritime patrol and anti-submarine warfare squadron of the Royal New Zealand Air Force. It operates the Boeing P-8 Poseidon from RNZAF Base Ohakea. The squadron was formed during the Second World War and has since been in continuous operation. A number of maritime patrol aircraft have been operated by the squadron over the course of its existence including the Short Singapore, Consolidated PBY Catalina, Short Sunderland and the Lockheed P-3 Orion.

The Royal New Zealand Air Force is the aerial service branch of the New Zealand Defence Force. It was formed initially in 1923 as a branch of the New Zealand Army, being known as the New Zealand Permanent Air Force, becoming an independent air force on 1 April 1937.