Aguadilla, founded in 1775 by Luis de Córdova, is a city and municipality located in the northwestern tip of Puerto Rico, bordered by the Atlantic Ocean to the north and west, north of Aguada, and Moca and west of Isabela. Aguadilla is spread over 15 barrios and Aguadilla Pueblo. It is a principal city and core of the Aguadilla-Isabela-San Sebastián Metropolitan Statistical Area.

Aguadilla barrio-pueblo is an urban barrio and the administrative center (seat) of Aguadilla, a municipality of Puerto Rico. Its population in 2010 was 3,627.