San Diego de la Unión zip code
| Zip code | Settlement | Type | City | Zone |
|---|---|---|---|---|
| 37874 | Barranca de Cano | Ranchería | - | Rural |
| 37876 | Betania | Ranchería | - | Rural |
| 37874 | Bordo de Guadalupe | Ranchería | - | Rural |
| 37870 | Bordo del Carmen | Ranchería | - | Rural |
| 37876 | Buenavista | Ranchería | - | Rural |
| 37874 | Buenavista del Charco de Araujo | Ranchería | - | Rural |
