1990–91 National Division 1
| 1990–91 National Division 1 | |
|---|---|
| Countries | England |
| Date | 22 September 1990 – 27 April 1991 |
| Champions | Bath (2nd title) |
| Runners-up | Wasps |
| Relegated | Moseley Liverpool St Helens |
| Matches played | 78 |
| Top point scorer | 126 – Rob Andrew (Wasps) |
| Top try scorer | 9 – Andrew Harriman (Harlequins) Rory Underwood (Leicester) |
The 1990–91 National Division 1 (sponsored by Courage Brewery) was the fourth season of the top tier of the English rugby union league system, the Courage Clubs Championship, currently known as Premiership Rugby. Wasps were the defending champions and Northampton and Liverpool St Helens the promoted sides.
Bath finished the season the champions for the second time, beating the holders Wasps by just one point. The two bottom sides, Moseley and Liverpool St Helens, were relegated to the 1991–92 National Division 2.