| Hato Rey Sur | |
| Native Name Lang: | es |
| Settlement Type: | Barrio |
| Pushpin Map: | Puerto Rico |
| Coordinates: | 18.4048°N -66.0586°W |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | San Juan |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 0.82 |
| Area Land Sq Mi: | 0.82 |
| Area Water Sq Mi: | 0 |
| Elevation Ft: | 33 |
| Population As Of: | 2020 |
| Population Note: | Source: 2020 Census |
| Population Total: | 8863 |
| Population Density Sq Mi: | auto |
| Timezone: | AST |
| Utc Offset: | -4 |
| Postal Code Type: | ZIP Code |
See main article: San Juan, Puerto Rico. Hato Rey Sur is one of the 18 barrios of the municipality of San Juan, Puerto Rico.[2] It is one of three barrios formerly known as Hato Rey. Hato Rey Sur was a barrio of the former municipality of Rio Piedras, before it was merged with the municipality of San Juan in 1951.[3] Following the annexation of Rio Piedras, the city of San Juan, and its surrounding area now including Rio Piedras, quadrupled its former size.[4]
In 2020, Hato Rey Sur had a population of 8,863 residents.[5]
The barrio of Hato Rey Sur is further subdivided into four “subbarrios".[6]
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.