|  | Cities & BuildingsPuerto Rico
Population: 3,725,789
Source: U.S. Census Bureau 2010
| | Name | | Pop. | | Bldgs. |
| 1 | | San Juan | | 428,591 | | 127 |
| 2 | | Carolina | | 187,472 | | 7 |
| 3 | | Luquillo | | 20,448 | | 5 |
| 4 | | Bayamón | | 222,195 | | 3 |
| 5 | | Guaynabo | | 102,287 | | 2 |
| 6 | | Arecibo | | 101,920 | | |
| 7 | | Ponce | | 155,038 | | |
| 8 | | Cayey | | 19,940 | | |
| 9 | | Cataño | | 28,140 | | |
| 10 | | Aguada | | 3,871 | | |
| 11 | | Mayagüez | | 95,280 | | |
| 12 | | Fajardo | | 41,729 | | |
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