R.C.S. Brainois
| Full name | Royal Cercle Sportif Brainois | |
|---|---|---|
| Founded | 1913 | |
| Stadium | Gaston Reiff Stadium | |
| Capacity | 3,000 | |
| President | Didier Van Hoof | |
| Sporting director | Henri Pensis | |
| Coach | Olivier Suray | |
| League | Belgian Division 2 | |
| 2024–25 | Belgian Division 3 ACFF A, 1st of 16 (promoted) | |
| Website | www.rcsbrainois.com/ | |
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Royal Cercle Sportif Brainois commonly known as RCS Brainois or simply Braine is a Wallonian Belgian football club from Braine-l'Alleud, Brabant. Founded in 1913, club is assigned matricule nr.75 and is one the oldest continuously existing clubs in the country. The team set to play in Belgian Division 2 from 2025–26, the fourth tier of Belgian football after promotion from Belgian Division 3 in 2024–25.