The 2025–26 Coupe de France preliminary rounds, Brittany was the qualifying competition to decide which teams from the leagues of the Brittany region of France took part in the main competition from the seventh round.
A total of fifteen teams qualified from the Brittany preliminary rounds.
In 2024–25, Stade Briochin were the only team from the region to progress beyond the eighth round, making a deep run to the quarter final stage before being beaten 7–0 by eventual competition winners Paris Saint-Germain FC.
Draws and fixtures On 1 July 2025, the league published details of the teams from the region participating in the competition this season. The article and the list itself stated 669 teams, though the headline stated 681. The draw for the first round was published on 30 July 2025, with 252 fixtures drawn. The second round draw was published on 27 August 2025, with 194 fixtures drawn.
The third round draw was published on 3 September 2025. 113 ties were drawn, and the teams from Régional 1 and Championnat National 3 entered at this stage. The fourth round draw was published on 17 September 2025, featuring teams from Championnat National 2, and with 58 ties drawn. The fifth round draw, including the two teams from Championnat National, was made on 1 October 2025, with 30 ties drawn. The sixth round draw was published on 15 October 2025.
First round These matches were played on 24 August 2025.