333 Squadron of the Royal Norwegian Air Force is a maritime patrol aircraft squadron. It traces its history, unbroken, to the establishment of No. 333 (Norwegian) Squadron Royal Air Force of the Second World War, formed in February 1942.

The Squadron was established as a detachment (No. 1477 (Norwegian) Flight) under the 210 Squadron of the British Royal Air Force, on 8 February 1942, by Captain Finn Lambrechts. The squadron was located in Woodhaven, Fife, Scotland.

The Mosquitoes were operated on shipping reconnaissance flights along the Norwegian coast.