1951 Speedway National League Division Two

The 1951 National League Division Two was the sixth post-war season of the second tier of motorcycle speedway in Great Britain. The League was extended again with 18 teams starting the season. New entrants were Motherwell Eagles and there were again three teams promoted from Division Three - Leicester Hunters, Liverpool Chads and Oxford Cheetahs. Plymouth moved back down in the opposite direction.

Norwich Stars retained their title.

Southampton Saints and Sheffield Tars resigned in mid-season and their records were expunged.