| Official Name: | San Antonio |
| Settlement Type: | Barrio |
| Pushpin Map: | Caribbean |
| Pushpin Map Caption: | Location of Puerto Rico |
| Coordinates: | 18.4277°N -66.9188°W |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | Quebradillas |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 6.08 |
| Area Land Sq Mi: | 6.08 |
| Area Water Sq Mi: | 0 |
| Population As Of: | 2010 |
| Population Note: | Source: 2010 Census |
| Population Total: | 5164 |
| Population Density Sq Mi: | 849.3 |
| Timezone: | AST |
| Utc Offset: | -4 |
| Elevation Ft: | 761 |
| Postal Code Type: | ZIP Code |
San Antonio is a barrio in the municipality of Quebradillas, Puerto Rico. Its population in 2010 was 5,164.[2] [3] [4]
San Antonio 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 population of San Antonio barrio was 1,760.[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] [10] [11]
The following sectors are in San Antonio barrio:[12]
Spanish; Castilian: Calle Guelo Sonera, Calle Pedro López, Carretera Nueva, [[Puerto Rico Highway 113|Carretera 113]], Carretera 478, Carretera 480, Carretera 482, Carretera 483, Parcelas San Antonio (Pequeñas y Grandes), Sector Arizona, Sector Barca de Oro (Negocio), Sector Casa de Piedra, Sector El Fósforo, Sector Guzmán, Sector La Hacienda, Sector La Rabúa, Sector Los Romanes, Sector Montadero, Sector Palmarito, and Spanish; Castilian: Sector Piquiñas.