| Localité | Code postal |
|---|---|
| Balcarres, Portland | JMBPD01 |
| Bangor Ridge, Portland | JMBPD02 |
| Belvedere, Portland | JM00000 |
| Black Hill, Portland | JM00000 |
| Boundbrook, Portland | JM00000 |
| Breastworks, Portland | JM00000 |
| Buff Bay, Portland | JMBPD03 |
| Bybrook, Portland | JM00000 |
| Cascade, Portland | JM00000 |
| Castle Comfort, Portland | JM00000 |
| Central Port Antonio, Portland | JM00000 |
| Charles Town, Portland | JM00000 |
| Claverty Cottage, Portland | JM00000 |
| Comfort Castle, Portland | JMBPD04 |
| Drapers, Portland | JM00000 |
| Durham, Portland | JM00000 |
| Fairy Hill, Portland | JMBPD05 |
| Fellowship, Portland | JMBPD06 |
| Fruitful Vale, Portland | JMBPD07 |
| Green Hill, Portland | JMBPD08 |
| Hectors River, Portland | JMBPD09 |
| Hope Bay, Portland | JMBPD10 |
| Kensington, Portland | JM00000 |
| Long Bay, Portland | JMBPD11 |
| Long Road, Portland | JM00000 |
| Manchioneal, Portland | JMBPD12 |