Stephen Girard Park is a 4-acre (16,000 m2) park in Philadelphia, Pennsylvania, in the South Philadelphia neighborhood of Girard Estate at 21st and Shunk Streets.
In 1831 Stephen Girard died, leaving most of his property to the City of Philadelphia, including his country mansion, Gentilhommerie. By the 1920s, urban development had reached the area, but because Girard's will stipulated that the estate could not be sold, the city initially developed the surrounding area as rental houses. In 1951, the City received permission from Orphans Court to sell the 1920s houses and to transfer the park surrounding the mansion to the City's Fairmount Park Commission.Coordinates: 39°55′13″N 75°10′59″W / 39.920339°N 75.183145°W