The St. Louis Eagles were a professional ice hockey team that played in the National Hockey League (NHL). Based in St. Louis, the Eagles played for only one year, the 1934–35 NHL season.
The team was founded in 1883 as the Ottawa Senators, a successful independent team that joined the NHL as a charter member in 1917. From the mid-1920s onward, they endured financial strain caused, in part, by being in the NHL's smallest market. The financial problems forced the Senators to suspend operations for the 1931–32 season. Upon their return to play, having sold their better players to raise funds, the Senators finished in last place for two straight seasons and continued to lose money.