Royal Cercle Sportif Brainois is a Wallonian Belgian football club from Braine-l'Alleud, Brabant.

Founded in 1913, club is assigned matricule nr.75[1] and is one the oldest continuously existing clubs in the country.

[1] Throughout its history, the club has spent 32 seasons at national level, of which 12 were in the third tier.

[2] Between 1946 and 1969 the club was continuously in the lower national league, however since they have been oscillating between the provincial leagues and national amateur tiers.

[2] Over the years the most famous players were Antoine Puttaert and Fernand Voussure, both former internationals who finished their career at the club, and Philippe Saint-Jean who spent six seasons in the 70s with them before returning as a coach in the late 80s.