In baseball, the 1884 World Series was a post-season championship series between the Providence Grays of the National League and the New York Metropolitans of the American Association at the Polo Grounds in New York City.

The Providence Grays were a Major League Baseball team based in Providence, Rhode Island who played in the National League from 1878 until 1885. The Grays played at the Messer Street Grounds in the Olneyville neighborhood. The team won the National League title twice, in 1879 and 1884. Following the 1884 season, they won the first World Series over the New York Metropolitans of the American Association. The team folded after the 1885 season.