For the Economic Census of Island Areas, a separate code is used to identify Commercial Regions in Puerto Rico. Commercial regions are groupings of Counties (Municipios) that subdivide Puerto Rico for the presentation of data. There are nine regions - their contents are listed below:

• Aguadilla: Aguada, Aguadilla, Isabella, Moca, Quebradillas, and San Sebastián.
• Arecibo: Arecibo, Barceloneta, Camuy, Ciales, Florida, Hatillo, Lares, Manatí, Utuado, and Vega Baja.
• Bayamón: Barranquitas, Bayamón, Cataño, Comerío, Corozal, Dorado, Morovis, Naranjito, Orocovis, Toa Alta, Toa Baja, and Vega Alta.
• Caguas: Aguas Buenas, Aibonito, Caguas, Cayey, Cidra, Gurabo, Humacao, Juncos, Las Piedras, San Lorenzo, and Yabucoa.
• Fajardo: Cieba, Culebra, Fajardo, Loíza, Luquillo, Naguabo, Río Grande, and Vieques.
• Guayama: Arroyo, Guayama, Maunabo, Patillas, Salinas, and Trujillo Alto.
• Mayagüez: Añasco, Cabo Rojo, Hormigueros, Lajas, Las Marqas, Maricao, Mayagüez, Rincón, Sabana Grande, and San Germán.
• Ponce: Adjuntas, Coamo, Guánica, Guayanilla, Jayuya, Juana Díaz, Peñuelas, Ponce, Santa Isabel, Villalba, and Yauco.
• San Juan: Canóvanas, Carolina, Guaynabo, and San Juan.