US Mondorf-les-Bains US Mondorf-les-Bains is a club from the spa town of Mondorf-les-Bains in south-eastern Luxembourg, with a history dating back to 1915. For much of its existence, the team operated outside the very top of Luxembourg football, but in recent years it has established itself in the country's highest division. Promotion to the top flight in 2014 began the most stable period in the club's history. Since the 2014/15 season, Mondorf has regularly competed against the leading teams in Luxembourg.
The club's first notable cup achievement came in the 1967/68 Luxembourg Cup, when Mondorf reached the semi-finals. It did not make the final, losing to Aris Bonnevoie. Much later, Mondorf achieved the biggest cup success in its history. In the 2015/16 season, the club reached the Luxembourg Cup final, where it faced F91 Dudelange. The match ended in a 1–0 defeat, leaving Mondorf still waiting for its first major senior trophy.
Remaining in the top flight after the 2014 promotion has itself been an important part of the club's development. US Mondorf-les-Bains has never won the Luxembourg championship, with its strongest performances coming primarily in cup competition and in the battle for higher league positions. In the 2024/25 season, the team finished seventh in the BGL Ligue, confirming its status as a regular member of the country's top division.
The club plays its home matches at Stade John Grün, named after John Grün, who was born in Mondorf-les-Bains. Grün became famous as a strongman in the late 19th and early 20th centuries and was regarded in his time as one of the world's strongest men. The stadium holds around 3,600 spectators and was also one of the venues used during the 2006 UEFA European Under-17 Championship in Luxembourg.
The traditional colours of US Mondorf-les-Bains are green and white. The club also maintains youth structures, extending its role beyond the senior team. Its most distinctive feature is its strong local character: Mondorf remains a relatively small town, and the club is an important part of its sporting identity. Its history is not one of dominance or numerous trophies, but of gradually establishing a place in Luxembourg's top flight and taking its greatest opportunity for national success when it reached the cup final in 2016.