The 1948–49 French Rugby Union Championship was won by Castres that beat Mont-de-Marsan in the final.
Formulas
The tournament was played by 48 teams divided into 8 pools.
Twenty-four teams were qualified to play in the second phase with eight pools of three teams.
Sixteen teams were qualified to play the "Last 16" phase.
Clément Fité, André Alary, Jacques Larzabal, Victor Lachat, Jean Pierre-Antoine, René Coll, Jean Matheu-Cambas, Raphael Lopez, André Chanfreau, Albert Torrens, Armand Balent, Robert Espanol, Raymond Fabre, Maurice Siman, Joseph Moreno
Léonce Beheregaray, Pierre Pascalin, André Brocas, Pierre Casassus, Jean-Noël Brocas, Georges Berrocq-Irigoin, René Lasserre, Jacques Larrezet, Jean Darrieussecq, Emmanuel Baradat, André Labeyrie, Jean Loyola, Jean Dachary, Rémy Cabos, Albert Bonnecaze