Census conduced by Lieutenant General Alexander O'Reilly conduced in 1765.
| City | Free people | Slaves | Proportion (number of slave for every free person) |
|---|---|---|---|
| San Germán | 5,373 | 577 | 1 / 9 |
| San Juan | 3,562 | 944 | 1 / 4 |
| Aguada | 3,976 | 296 | 1 / 13 |
| Añasco | 3,199 | 199 | 1 / 14 |
| Ponce | 2,960 | 354 | 1 / 8 |
| Fajardo | 464 | 10 | 1 / 5 |
| Caguas | 514 | 90 | 1 / 6 |
| Utuado | 558 | 50 | 1 / 11 |
| Pepino (San Sebastián) | 58 | 33 | 1 / 18 |
| La Tuna (Isabela) | 688 | 7 | 1 / 98 |
| Sub-Total | 39,846 | 5,037 | 1 / 10 |
| Total | 44,883 | ||
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