Puerto Rico counties ranked by the lowest county-wide student-to-teacher ratio. Counties need at least 3 schools and 1,000 students to qualify. The median ranked county is at 9.8:1. Showing ranks 51 to 72.
| # | County | State | Ratio |
|---|---|---|---|
| 51 | Ponce Municipio | PR | 10.3:1 |
| 52 | Río Grande Municipio | PR | 10.3:1 |
| 53 | Yabucoa Municipio | PR | 10.3:1 |
| 54 | Vega Baja Municipio | PR | 10.4:1 |
| 55 | Añasco Municipio | PR | 10.5:1 |
| 56 | Canóvanas Municipio | PR | 10.5:1 |
| 57 | Juncos Municipio | PR | 10.5:1 |
| 58 | Las Piedras Municipio | PR | 10.5:1 |
| 59 | Moca Municipio | PR | 10.5:1 |
| 60 | Sabana Grande Municipio | PR | 10.5:1 |
| 61 | Barranquitas Municipio | PR | 10.6:1 |
| 62 | Luquillo Municipio | PR | 10.7:1 |
| 63 | Humacao Municipio | PR | 10.8:1 |
| 64 | Isabela Municipio | PR | 10.8:1 |
| 65 | Adjuntas Municipio | PR | 10.9:1 |
| 66 | Rincón Municipio | PR | 10.9:1 |
| 67 | San Sebastián Municipio | PR | 11.0:1 |
| 68 | San Lorenzo Municipio | PR | 11.2:1 |
| 69 | Villalba Municipio | PR | 11.2:1 |
| 70 | Loíza Municipio | PR | 11.4:1 |
| 71 | Aguada Municipio | PR | 11.9:1 |
| 72 | Hormigueros Municipio | PR | 12.6:1 |