| Clubname: | Blue Boys Muhlenbach |
| Fullname: | Football Club Blue Boys Muhlenbach |
| Founded: | 1932 |
| Dissolved: | 18 May 2020 |
| Ground: | Stade Mathias Mamer, Luxembourg |
| Capacity: | 1,100 (200 seated) |
| Chrtitle: | President |
| Chairman: | Mersad Dragolavcanin |
| Manager: | Fangio Buyse |
| League: | Luxembourg National Division |
| Season: | 2018–19 |
| Position: | Division of Honour, 2nd (promoted) |
| Leftarm1: | 75B2ED |
| Body1: | 75B2ED |
| Rightarm1: | 75B2ED |
| Shorts1: | 75B2ED |
| Socks1: | 75B2ED |
FC Blue Boys Muhlenbach, commonly known as Blue Boys Muhlenbach, was an association football club based in the Muhlenbach district of Luxembourg, the capital city of Luxembourg.
The club was founded in 1932 as FC Blue Boys Muhlenbach, but changed its name to Sport Verein Muhlenbach. The original name was restored in 1944 and remained until 2009, when the name of Muhlenbach Lusitanos was adopted. In 2012 the club was renamed again as FC Blue Boys Muhlenbach.[1] As of the 2011–12 season, they played in the Luxembourg Division of Honour, the second tier of football in the country.
Blue Boys were promoted to the top flight of Luxembourg football in 2019.
On 18 May 2020 the club merged with FC RM Hamm Benfica.