| City | Number of Mailboxes |
|---|---|
| San Juan | 161 |
| Guaynabo | 21 |
| Trujillo Alto | 9 |
| Carolina | 39 |
| Bayamon | 39 |
| Fort Buchanan | 1 |
| Canovanas | 8 |
| Loiza | 3 |
| Aguadilla | 15 |
| San Antonio | 3 |
| Moca | 5 |
| Aguada | 7 |
| Isabela | 4 |
| Rincon | 5 |
| Anasco | 7 |
| Quebradillas | 6 |
| San Sebastian | 7 |
| Camuy | 6 |
| Mayaguez | 36 |
| Las Marias | 3 |
| Hatillo | 5 |
| Lares | 5 |
| Arecibo | 23 |
| Maricao | 3 |
| Hormigueros | 6 |
| Angeles | 3 |
| Bajadero | 3 |
| Cabo Rojo | 7 |
| San German | 10 |
| Utuado | 7 |
| Sabana Grande | 4 |
| Yauco | 8 |
| Garrochales | 3 |
| Lajas | 7 |
| Sabana Hoyos | 3 |
| Boqueron | 3 |
| Adjuntas | 3 |
| Toa Baja | 17 |
| Humacao | 7 |
| Las Piedras | 4 |
| Punta Santiago | 3 |
| Rio Blanco | 3 |
| Naguabo | 4 |
| Juncos | 9 |
| Yabucoa | 6 |
| San Lorenzo | 6 |
| Gurabo | 7 |
| Maunabo | 5 |
| Caguas | 35 |
| Ceiba | 4 |
| Patillas | 4 |
| Fajardo | 11 |
| Rio Grande | 7 |
| Puerto Real | 2 |
| Palmer | 2 |
| Luquillo | 4 |
| Aguas Buenas | 4 |
| Cayey | 11 |
| Arroyo | 5 |
| Cidra | 5 |
| Guayama | 8 |
| Culebra | 3 |
| Vieques | 3 |
| Toa Alta | 6 |
| Dorado | 5 |