Bayamón is a city and municipality in Puerto Rico. Located on the northeastern coastal plain, it is bounded by Guaynabo to the east, Toa Alta and Naranjito to the west, Toa Baja and Cataño to the north, and Aguas Buenas and Comerío to the south. Part of the San Juan metropolitan area, Bayamón is spread over 11 barrios and the downtown area and administrative center of Bayamón Pueblo. With a population of 185,187 as of the 2020 census, it is the second most populated municipality in the archipelago and island after the capital of San Juan.