| Place | Post Code |
|---|---|
| Balante, Gapan | 3105 |
| Bayanihan, Gapan | 3105 |
| Bulak, Gapan | 3105 |
| Bungo, Gapan | 3105 |
| Kapalangan, Gapan | 3105 |
| Mabunga, Gapan | 3105 |
| Maburak, Gapan | 3105 |
| Mahipon, Gapan | 3105 |
| Makabaclay, Gapan | 3105 |
| Malimba, Gapan | 3105 |
| Mangino, Gapan | 3105 |
| Marelo, Gapan | 3105 |
| Pambuan, Gapan | 3105 |
| Parcutela, Gapan | 3105 |
| Puting Tubig, Gapan | 3105 |
| San Lorenzo, Gapan | 3105 |
| San Nicolas, Gapan | 3105 |
| San Roque, Gapan | 3105 |
| San Vicente, Gapan | 3105 |
| Santa Cruz, Gapan | 3105 |
| Santo Cristo Norte, Gapan | 3105 |
| Santo Cristo Sur, Gapan | 3105 |
| Santo Niño, Gapan | 3105 |