| Official Name: | Caonillas Arriba |
| Settlement Type: | Barrio |
| Pushpin Map: | Caribbean |
| Pushpin Map Caption: | Location of Puerto Rico |
| Coordinates: | 18.1422°N -66.435°W |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | Villalba |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 8.11 |
| Area Land Sq Mi: | 8.08 |
| Area Water Sq Mi: | 0.03 |
| Population As Of: | 2010 |
| Population Note: | Source: 2010 Census |
| Population Total: | 1537 |
| Population Density Sq Mi: | 190.2 |
| Timezone: | AST |
| Utc Offset: | -4 |
| Elevation Ft: | 1424 |
| Postal Code Type: | ZIP Code |
Caonillas Arriba is a barrio in the municipality of Villalba, Puerto Rico. Its population in 2010 was 1537.[2] [3] [4]
Caonillas Arriba 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 Caonillas Arriba barrio was 2,200.[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 Caonillas Arriba barrio:[10]
Spanish; Castilian: [[Puerto Rico Highway 151|Carretera 151]] Intersección 553, La Gallera (Sector San Miguel), Sector Caonillas which includes {{lang|es|La Sierrita, La Escuela, Los Aponte, Cubones Norte, El Puente, Caonillas (Ceo Rivera), Finca El Coroco, La Terraza, and Spanish; Castilian: Sector La Ortiga (El Pueblito).
As of 2015, La Sierrita has not had regular water service for years.[11] The Federal Emergency Management Agency earmarked money in 2020 to be used for permanent upgrades to water service systems for residents of La Sierrita, among others.[12]