1990–91 Courage League National Division Three

The 1990–91 Courage League National Division Three was the fourth full season of rugby union within the third tier of the English league system, currently known as National League 1. The division was increased by one team and they each played one match against the other teams, playing a total of twelve matches each.

Sponsorship
National Division Three is part of the Courage Clubs Championship and is sponsored by Courage Brewery