1948–49 French Rugby Union Championship

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.

Context
The 1949 Five Nations Championship was won by Ireland, France ended second.

The "Coupe de France" was won by Bègles that beat Toulose in the final.

Second round
In bold the qualified for "last 16" phase.

{|width="100%" align="center" border="0" cellpadding="4" cellspacing="5"
 * - valign="top" align="left"
 * width="33%" |

Poule A

 * Béziers
 * Auch
 * Stadoceste


 * width="33%" |

Poule B

 * Bègles
 * Limoges
 * Dax


 * width="33%" |

Poule C

 * Lourdes
 * Bergerac
 * Montauban


 * - valign="top" align="left"
 * width="33%" |

Poule D

 * Montferrand
 * Tyrosse
 * Pau


 * width="33%" |

Poule E

 * Brive
 * Touloun
 * Soustons


 * width="33%" |

Poule F

 * Castres
 * Mont-de-Marsan
 * Valence


 * - valign="top" align="left"
 * width="33%" |

Poule G

 * Vienne
 * Agen
 * Lyon OU


 * width="33%" |

Poule H

 * Biarritz 
 * Toulouse
 * Paris Université Club


 * width="33%" |
 * }

Last 16
In bold the clubs qualified for the quarter of finals.

Quarter of finals
In bold the clubs qualified for The semifinals.

Final
The first match ended 3–3 after over time. A second match was necessary.