As of the 2017–18 season, the club plays in Championnat National 3, the fifth level of French football.

US Lusitanos Saint-Maur was founded in 1966 by José Lebre, amongst the Portuguese immigrant community in the town of Saint-Maur-des-Fossés.

This took longer than planned, but they arrived in the newly formed National 3 in 1993, as champions of the Division d'Honneur in the Paris region.

They suffered another relegation back to the CFA in 2002, and due to a failed merger with US Créteil-Lusitanos and failure to properly register the team, they were administratively relegated to the Division Supérieure Régionale of the Paris region, effectively level seven of French football.

[1] The club gained promotion again to Championnat de France Amateur 2 (level 5) in 2015 and to the CFA in 2016.