Montaña is a rural barrio in the municipality of Aguadilla, Puerto Rico.

[3][4][5] Montaña 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 population of Montaña barrio was 633.

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][17][18] The following sectors are in Montaña barrio:[19] Poblado San Antonio, Reparto Chepo Fernández, Reparto Los Pinos, Reparto Roldán, Residencial Nuevo San Antonio, Sector Campo Alegre, Sector Las Palmas, Sector Pablo Hernández, Sector Parcelas Nuevas, Sector Villa Primavera, Urbanización Brisas de Campo Alegre, Urbanización Marín García, Urbanización Paseo Campo Alegre, Urbanización Paseo Continental, Urbanización Villa Sotomayor, and Villa Jardines.