| Locality | Post Code |
|---|---|
| Conhuaxo, Huamuxtitlán | 41202 |
| Coyahualco, Huamuxtitlán | 41204 |
| Huamuxtitlán, Huamuxtitlán | 41200 |
| Jilotepec, Huamuxtitlán | 41205 |
| San Miguel Totolapa, Huamuxtitlán | 41207 |
| San Pedro Aytepec, Huamuxtitlán | 41230 |
| Santa Cruz, Huamuxtitlán | 41222 |
| Tepetlapa, Huamuxtitlán | 41206 |
| Tlalquetzala, Huamuxtitlán | 41220 |
| Tlaquiltepec, Huamuxtitlán | 41222 |
| Totolapa, Huamuxtitlán | 41207 |