| Locality | Post Code |
|---|---|
| San Dionisio, Peto | 97936 |
| San Francisco, Peto | 97935 |
| San Gregorio, Peto | 97933 |
| San Mateo, Peto | 97935 |
| San Miguel, Peto | 97937 |
| San Nicolás Yoactún, Peto | 97934 |
| San Pedro, Peto | 97933 |
| San Salvador, Peto | 97937 |
| San Sebastián, Peto | 97936 |
| Santa Cruz, Peto | 97935 |
| Santa Elena, Peto | 97935 |
| Santa Rosa, Peto | 97937 |
| Santa Ursula, Peto | 97937 |
| Temozon, Peto | 97933 |
| Tixhualactun, Peto | 97933 |
| Tobxila, Peto | 97937 |
| Trapiche, Peto | 97937 |
| Trinidad, Peto | 97930 |
| Uitzina, Peto | 97937 |
| Xcabanchen, Peto | 97934 |
| Xoy, Peto | 97932 |
| Xpechil, Peto | 97937 |
| Yaxcopil, Peto | 97937 |