419 Tactical Fighter Training Squadron (French: 419e Escadron d'entraînement à l'appui tactique) was a unit of the Royal Canadian Air Force.

It started operations in January 1942, converting almost immediately to Wellington Mk IIIs and moving north to Leeming as part of the new 6 Group in August 1942.

Squadron personnel flew a total of 4,325 operational sorties during the war from Mannheim to Nuremberg, Milan to Berlin and Munich to Hanover, inflicting heavy damage on the enemy.

In particular the attacks on German cities intensified from early October when more than 100 crews were regularly dispatched to bomb Frankfurt, Mannheim, Berlin, Magdeburg, Leipzig and Nuremberg.

During March 1944 there was much mining as described earlier, but this was the precursor to 6 Group's 118-crew attack on Nuremberg at the end of the month when it was to suffer its worst loss of thirteen aircraft in a single sortie.

II JD-258 coded VR-K borrowed from 419 Squadron for an operation to Wuppertal on 24/25 June 1943 was intercepted by a night fighter, Hans-Dieter Frank, and crashed near Eindhoven killing the crew which included two RCAF personnel).

419 was re-formed on 15 March 1955 as 419 All-Weather Fighter Squadron, and moved to the NATO Air Division base at Baden-Soellingen, Germany shortly thereafter.

The squadron was re-formed again at 4 Wing Cold Lake on 23 July 2000 to conduct advanced lead-in fighter training for Canadian and NATO pilots using nine CT-155 Hawk aircraft.

Pilot Officer Andrew Charles Mynarski of 419 Squadron was posthumously awarded the Victoria Cross for his actions on 12/13 June 1944 during a bombing mission over Europe.

A restored Lancaster operated by the Canadian Warplane Heritage Museum in Hamilton, Ontario, is painted in the markings of aircraft KB 726 VR-A of 419 Squadron in his honour.