| Official Name: | Quebrada Arenas |
| Native Name Lang: | es |
| Settlement Type: | Barrio |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | San Juan |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 2.46 |
| Area Land Sq Mi: | 2.46 |
| Area Water Sq Mi: | 0 |
| Population As Of: | 2010 |
| Population Note: | 2010 census |
| Population Total: | 2747 |
| Population Density Sq Mi: | 1116.7 |
| Timezone: | AST |
| Utc Offset: | -4 |
| Elevation Ft: | 446 |
| Postal Code Type: | ZIP Code |
See main article: San Juan, Puerto Rico.
Quebrada Arenas (Spanish for sandy creek) is one of the 18 barrios of the municipality of San Juan, Puerto Rico. Located in the southwest corner of San Juan, it is the only rural barrio in the municipality. Quebrada Arenas is totally outside San Juan's municipal urban zone according to the last census. In 2010 it had a population of 2,747 and a land area of 2.46sqmi, resulting in a population density of 1,116.7 residents per square mile (431.2 km2), the lowest of any barrio in San Juan.[2]
Quebrada Arenas has boundaries with the municipalities of Aguas Buenas and Caguas to the south, and Guaynabo to the west, and is bounded by Caimito barrios to the east and Tortugo barrio to the north.