| Titre: | French Rugby Championship 1942–43 |
| Organisateur: | FFR |
| Nombre D'éditions: | 44 |
| Countries: |  France |
| Participants: | 95 teams |
| Champions: | Bayonne |
| Runnersup: | Agen |
| Prevseason: | 1938–39 |
| Nextseason: | 1943–44 |
The 1942–43 French Rugby Union Championship was won by Bayonne that beat Agen in the final.
After three seasons of non official competitions, the FFR made the decision on 5 June 1942, to restart to play the championship.
At the championship participated:
After the occupation of the second zone by the German Army, in November, the FFR changed the denominations in "Zone North" and "Zone South".
The final was played by the winners of the two zone.
The "Coupe de France" was won by le Agen that beat SBUC in the final.
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| Teams | Bayonne - Agen | |
| Score | 3-0 | |
| Date | 21 March 1943 | |
| Venue | Parc des Princes, Paris | |
| Arbitre | Jean Rous | |
| Squad | ||
| Bayonne | Jean Mourguy, Ricardo Perez, Jean Casteigt, Jean Dumas, Louis Bisauta, Pierre Labèque, René Arotça, Robert Cazayrous, Jean Dubalen, David Zabaleta, Marcel Lafite, Maurice Calhay, Jean Dauger, Pierre Larre, André Alvarez | |
| Agen | François Inza, Jean Clavé, Jean Londaits-Béhère, Marcel Laurent, Robert Landes, Guy Basquet, Maurice Brunetaud, Jean Matheu-Cambas, André Verdier, Camille Bonnet, Georges Baladière, Charles Calbet, Franck Gaubert, Angel Grandaty, Marius Guiral | |
| Points marqués | ||
| Bayonne | 1 essai de Larre | |
| Agen |