1979–80 French Rugby Union Championship
The 1979–80 French Rugby Union Championship was won by Béziers beating Toulouse in the final.
The group B was won by Chambéry beating Angoulême in the final.
Formula
For the first time, the clubs of the "Group B" didn't participate for the title, but play a proper championship.The group A, like the group B was divided in four pools of ten clubs.
The eight better of each pool were qualified for the knockout stages.
Group A
Qualification round
In bold the teams qualified for knock out stages, ordered second the ranking."Last 32"
In bold the clubs qualified for the next round| Team 1 | Team 2 | Results |
| Béziers | Valence | 41-6 |
| Narbonne | Carcassonne | 9-6 |
| RRC Nice | Mazamet | 22-15 |
| Oloron | Aurillac | 6-9 |
| Perpignan | US Bressane | 22-9 |
| Graulhet | Biarritz | 14-7 |
| Montferrand | Grenoble | 10-3 |
| Stade Bagnérais | Boucau | 21-3 |
| Tulle | Dax | 15-6 |
| Lourdes | Saint-Jean-de-Luz | 28-3 |
| Brive | Stadoceste | 12-9 |
| Pau | Auch | 18-3 |
| Agen | Montchanin | 21-11 |
| Toulouse | Bègles | 17-7 |
| Bayonne | Romans | 18-11 |
| Toulon | Avignon Saint-Saturnin | 28-9 |
"Last 16"
In bold the clubs qualified for the next round| Team 1 | Team 2 | Results |
| Béziers | Narbonne | 21-10 |
| RRC Nice | Aurillac | 29-9 |
| Perpignan | Graulhet | 12-3 |
| Montferrand | Stade Bagnérais | 11-13 |
| Tulle | Lourdes | 15-9 |
| Brive | Pau | 15-6 |
| Agen | Toulouse | 4-9 |
| Bayonne | Toulon | 25-14 |
Quarter of finals
In bold the clubs qualified for the next round| Team 1 | Team 2 | Results |
| Béziers | RRC Nice | 19-15 |
| Perpignan | Stade Bagnérais | 30-15 |
| Tulle | Brive | 19-22 |
| Toulouse | Bayonne | 24-3 |
Group B
Qualification round
In bold the teams qualified for knock out stages, ordered second the ranking.Quarter of finals
| Team 1 | Team 2 | Results |
| Angoulême | Carmaux | 48-6 |
| Nîmes | La Voulte | 15-4 |
| Albi | Mont de Marsan | 23-18 |
| Chambéry | Stade Beaumontois | 21-12 |