Le Club Omnisports des Ulis is a French association football club based in Les Ulis, Essonne, founded in 1977.

CO Les Ulis is primarily known for being the club where France national team members Patrice Evra and Thierry Henry began their careers.

The club has also developed emerging youth prospects, such as Anthony Martial, Yaya Sanogo, Sega Keita, and Willy Kambwala.

CO Les Ulis honours are minimal with the club slowly ascending the French football league system since achieving promotion from the Division d'Excellence during the 1994–95 season.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.