1990–91 French Rugby Union Championship
| French Rugby Championship 1990–91 | |
|---|---|
| Countries | France |
| Number of teams | 80 teams |
| Champions | Bègles-Bordeaux (2nd title) |
| Runners-up | Toulouse |
The 1990–91 French Rugby Union Championship was 99th edition of France's top division of rugby union. Bègles-Bordeaux were champions after beating Toulose in the final.
It was the club's second bouclier de Brennus after their first win in 1969.