Hato Rey Sur is one of the 18 barrios of the municipality of San Juan, Puerto Rico.

[4] Following the annexation of Rio Piedras, the city of San Juan, and its surrounding area now including Rio Piedras, quadrupled its former size.

[11] The barrio of Hato Rey Sur is further subdivided into four “subbarrios".

[12] Although the only Tren Urbano station to be fully located within Hato Rey Sur is Piñero, the Rio Piedras and Universidad stations also serve the barrio due to their close proximity.

This San Juan, Puerto Rico location article is a stub.