Union Sportive Monastirienne (Arabic: الاتحاد الرياضي المنستيري), also known as USM or USMo, is a football club from Monastir in Tunisia. Founded in 1923 under the name Ruspina Sports, it was renamed Union Sportive Monastirienne in 1942. The new name reflects the union between Ruspina Sports and other clubs in town (swimming, petanque, etc.) and the Nationalists union of Monastir (like Mustapha Ben Jannet). The team plays in blue and white colors, on its own Mustapha Ben Jannet stadium (capacity of 20,000). They train in the El Moraudi club hotel port El Kantaoui.
US Monastir's alternate logo used in the away shirt.