The 2020–21 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 twelve teams qualified from the Brittany Preliminary rounds. In 2019–20, FC Guichen and Stade Briochin progressed the furthest in the main competition, reaching the ninth round before losing to Caen (1–2) and ESM Gonfreville (on penalties) respectively.
Schedule A total of 687 teams entered from the region. 666 teams entered at the first round stage, which took place on 30 August 2020, with one team given a bye to the second round. The first round draw was published on 30 July 2020. The second round draw was published on 1 September 2020.
The third round draw, which featured the teams from Championnat National 3, was made on 10 September 2020. The fourth round draw, which featured the teams from Championnat National 2, was made on 23 September 2020. The fifth round draw, which saw the two Championnat National teams from the region enter the competition, was made on 7 October 2020. The sixth round draw was made on 21 October 2020.
First round These matches were played on 29 and 30 August 2020.