1990–91 Courage League National Division Two
| 1990–91 Courage League National Division Two | |
|---|---|
| Countries | England | 
| Champions | Rugby (1st title) | 
| Runners-up | London Irish | 
| Relegated | Richmond and Headingley | 
| Matches played | 78 | 
| Top point scorer | 117   Brian Mullen  (London Irish)  | 
| Top try scorer | 9   Lindsay Renwick  (London Scottish)  | 
The 1990–91 Courage League National Division Two was the fourth full season of rugby union within the second tier of the English league system, currently known as the RFU Championship.
Rugby, the champions, were promoted to the Courage League National Division One for season 1991–92 along with the runner–up, London Irish. Headingley finished last and were relegated to Courage League National Division Three for season 1991–92 as were Richmond who finished one place above them.