Keystone Park is a former baseball ground located in Philadelphia, Pennsylvania. The ground was home to the Philadelphia Keystones of the Union Association in 1884.
The location of the ballpark was on the east side of Broad Street and Moore Street.
The field was the original grounds of the Forepaugh Circus.(Rich Westcott, Philadelphia's Old Ballparks, Temple University Press, 1996, p. 6.) Not to be confused with the later Forepaugh Park.
Coordinates: 39°55′41″N 75°10′09″W / 39.92816°N 75.16905°W