The St. Louis Terriers were a baseball club that played in the short-lived Federal League in 1914 and 1915.

The team was owned by ice magnate Phil Ball, who later was owner of the St. Louis Browns.

In their inaugural season, the Terriers posted a 62–89 record (.411) and finished in last place, 25 games behind the league champion Indianapolis Hoosiers.

The Terriers had an 87–67 mark (.565), ending up in second place, 1⁄10 of a percentage point behind the champion Chicago Whales, who finished 86–66 (.566).

Among the St. Louis Terriers players who had experience (or would gain experience) in the American and/or National Leagues were Dave Davenport, Al Bridwell, Mordecai Brown, Doc Crandall, Grover Hartley, Ward Miller, Bob Groom, Fielder Jones, Eddie Plank, Jack Tobin and Ed Willett.