Bayamón, Puerto Rico in the context of "Toa Baja, Puerto Rico"

The San Juan–Bayamón–Caguas metropolitan area, most commonly known as the San Juan metropolitan area (Spanish: área metropolitana de San Juan), is the largest and most populous metropolitan statistical area (MSA) in Puerto Rico, concentrated in the capital municipality of San Juan and surrounding municipalities, including Bayamón, Caguas, and Carolina, on the northeastern coastal plain of the main island. One of 6 metropolitan statistical areas in Puerto Rico, it is within the San Juan–Bayamón combined statistical area (CSA), which is one of 3 primary statistical areas in the archipelago as defined by the United States Census Bureau. As of 2023, the estimated population of the San Juan–Bayamón–Caguas metropolitan area is 842,535 in municipalities in the conurbation and 1,193,198 in municipalities outside the urban core, making it the fourth largest in the insular Caribbean.

Bayamón is a barrio and the administrative center (seat) of Bayamón, a municipality of Puerto Rico. Its population in 2010 was 4,746.

As was customary in Spain, in Puerto Rico, the municipality has a barrio called pueblo which contains a central plaza, the municipal buildings (city hall), and a Catholic church. Fiestas patronales (patron saint festivals) are held in the central plaza every year.

Guaynabo (Spanish pronunciation: [ɡwajˈnaβo], locally [wajˈnaβo]) is a city and municipality on the northeastern coastal plain of Puerto Rico. Located west of the capital San Juan, east of Bayamón, south of Cataño and San Juan Bay, and north of Aguas Buenas, Guaynabo is spread over 9 barrios and the downtown area and administrative center of Guaynabo Pueblo. With a land area of 27.13 square miles (70.3 km) and a population of 89,780 as of the 2020 census, it is part of the San Juan metropolitan area. The studios of WAPA-TV, the most watched television station in Puerto Rico, are located in Guaynabo.

Toa Alta (Spanish pronunciation: [ˈtoa ˈalta]) is a town and municipality of Puerto Rico located in the northern coast of the island, north of Naranjito; south of Dorado and Toa Baja; east of Vega Alta and Corozal; and west of Bayamón. Toa Alta is spread over eight barrios and Toa Alta Pueblo (the downtown area and the administrative center of the city). It is part of the San Juan-Caguas-Guaynabo metropolitan statistical area. There are nine barrios in Toa Alta and altogether in 2020 had a population of 66,852. Río de la Plata, is a large river that runs through Toa Alta. Toa Alta celebrates its patron saint festival in May.

Naranjito (Spanish pronunciation: [naɾaŋˈxito]) is a town and municipality of Puerto Rico located in the central region of the island, south of Toa Alta; north of Barranquitas and Comerío; east of Corozal; and west of Bayamón. Naranjito is spread over 7 barrios and Naranjito Pueblo (the downtown area and the administrative center). It is part of the San Juan-Caguas-Guaynabo Metropolitan Statistical Area.

Cataño (Spanish pronunciation: [kaˈtaɲo]) is a town and municipality on the northeastern coastal plain of Puerto Rico. It is west of the capital San Juan, east of Toa Baja, north of Bayamón and Guaynabo, and south of San Juan Bay. Part of the San Juan metropolitan area, Cataño is spread over 7 barrios and the downtown area and administrative center of Cataño Pueblo. It is the smallest municipality of Puerto Rico by land area.