| Official Name: | Piedras Blancas |
| Settlement Type: | Barrio |
| Pushpin Map: | Caribbean |
| Pushpin Map Caption: | Location of Puerto Rico |
| Coordinates: | 18.3355°N -66.9713°W |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | San Sebastián |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 2.2 |
| Area Land Sq Mi: | 2.2 |
| Area Water Sq Mi: | 0 |
| Population As Of: | 2010 |
| Population Note: | Source: 2010 Census |
| Population Total: | 2563 |
| Population Density Sq Mi: | 1165 |
| Timezone: | AST |
| Utc Offset: | -4 |
| Elevation Ft: | 423 |
| Postal Code Type: | ZIP Code |
Piedras Blancas is a barrio in the municipality of San Sebastián, Puerto Rico. Its population in 2010 was 2,563.[2] [3] [4]
Piedras Blancas was in Spain's gazetteers[5] until Puerto Rico was ceded by Spain in the aftermath of the Spanish–American War under the terms of the Treaty of Paris of 1898 and became an unincorporated territory of the United States. In 1899, the United States Department of War conducted a census of Puerto Rico finding that the combined population of Cidral and Piedras Blancas barrios was 1,125.[6]
Barrios (which are, in contemporary times, roughly comparable to minor civil divisions)[7] in turn are further subdivided into smaller local populated place areas/units called sectores (sectors in English). The types of sectores may vary, from normally sector to urbanización to reparto to barriada to residencial, among others.[8] [9]
The following sectors are in Piedras Blancas barrio:[10]
Spanish; Castilian: Avenida Emérito Estrada Rivera, Barriada Segarra (Cuchilandia), [[Puerto Rico Highway 111|Carretera 111]], [[Puerto Rico Highway 119|Carretera 119]], [[Puerto Rico Highway 125|Carretera 125]], Sector Las Palmas (Escuela Bilingüe), Sector Lindín, Sector Los Pinos, Sector Tito Ríos, Urbanización Ubiñas, and Spanish; Castilian: Urbanización Valle Verde.