[3][4][5] Añasco Arriba was in Spain's gazetteers[6] 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 Añasco Arriba and Añasco Abajo barrios was 1,027.

Barrios (which are, in contemporary times, roughly comparable to minor civil divisions)[13] in turn are further subdivided into smaller local populated place areas/units called sectores (sectors in English).

[14][15][16] The following sectors are in Añasco Arriba barrio:[17] Carretera 109, Extensión Brisas de Añasco, Jardines de Añasco, Sector Nicolás Soto Ramos, Urbanización Brisas de Añasco, and Urbanización Sixto Nieto.

This Añasco, Puerto Rico location article is a stub.