J.S.T. Stranahan is a bronze statue in Brooklyn's Prospect Park in New York City. Designed by Frederick William MacMonnies and erected in 1891 near the park's entrance at Grand Army Plaza, it honors James S. T. Stranahan, a businessman from Brooklyn who served on the city's park commission and was instrumental in Prospect Park's creation. The statue is considered one of MacMonnies' finest works and was praised for its realism. An inscription on the pedestal of the statue includes the Latin phrase LECTOR SI MONUMENTUM REQUIRIS CIRCUMSPICE which also marks the tomb of Christopher Wren.

Prospect Park is a 526-acre (2.13 km2) urban park in the New York City borough of Brooklyn. The park is situated between the neighborhoods of Park Slope, Prospect Heights, Prospect Lefferts Gardens, Flatbush, and Windsor Terrace, and is adjacent to the Brooklyn Museum, Grand Army Plaza, and the Brooklyn Botanic Garden. With an area of 526 acres (213 ha), Prospect Park is the second-largest public park in Brooklyn, behind Marine Park. Designated as a New York City scenic landmark and listed on the National Register of Historic Places, Prospect Park is operated by the Prospect Park Alliance and NYC Parks.