1989–90 National Division 1
| 1989–90 National Division 1 | |
|---|---|
| Countries | England |
| Date | 9 September 1989 – 28 April 1990 |
| Champions | Wasps (1st title) |
| Runners-up | Gloucester |
| Relegated | Bedford |
| Matches played | 66 |
| Top point scorer | 126 – John Liley (Leicester) |
| Top try scorer | 10 – Anthony Swift (Bath) |
The 1989–90 National Division 1 (sponsored by Courage Brewery) was the third season of the top tier of the English rugby union league system, the Courage Clubs Championship, currently known as Premiership Rugby. Bath were the defending champions while Saracens and Bedford were the promoted sides.
A very competitive league was won by Wasps, pipping Gloucester to the title by just one point, with Bath and Saracens not far behind in 3rd and 4th spot. Bedford were the relegated side, losing all 11 fixtures to finish bottom of the table and drop down to the 1990–91 National Division 2.