Urban Sax is an ensemble founded by the French composer Gilbert Artman made up of massive numbers of saxophones, accompanied by percussion and sometimes voices. The group is directed by Artman and performs his compositions, which are generally repetitive and minimalist, often sounding somewhat mechanistic rather than conventionally expressive.

The group was formed in 1973, when Artman organized a concert by a group of eight saxophonists he had produced at a classical music festival in Menton, in the south of France. In subsequent years, the number of players grew to 12, 16, 20, 24, and 30, and by the early 21st century, the group consisted of 52 musicians (with saxophones ranging from the soprano to bass registers). Artman frequently integrates local musicians and dancers into his performances, and thus the ensemble can encompass as many as 200 performers.

Urban Sax has performed throughout Europe, in Asia and at Expo 86 in Vancouver. The group's performances are performance art happenings; players wear metallic space suit-like costumes together with gas masks, and each performance is a unique ritualistic event that is planned for the particular architectural or natural space where it is to take place.