| Locality | Post Code |
|---|---|
| Jacks River, Saint Mary | JM00000 |
| Jeffery Town, Saint Mary | JM00000 |
| Labyrinth, Saint Mary | JMBMY17 |
| Long Road, Saint Mary | JMBMY18 |
| Lucky Hill, Saint Mary | JMBMY19 |
| Mango Valley, Saint Mary | JM00000 |
| Martin, Saint Mary | JM00000 |
| Mason Hall, Saint Mary | JM00000 |
| Mile Gully, Saint Mary | JM00000 |
| Oracabessa, Saint Mary | JMBMY20 |
| Pembroke Hall, Saint Mary | JMBMY21 |
| Port Maria, Saint Mary | JMBMY22 |
| Prospect, Saint Mary | JM00000 |
| Retreat, Saint Mary | JMBMY23 |
| Richmond, Saint Mary | JMBMY25 |
| Robins Bay, Saint Mary | JM00000 |
| Sandside, Saint Mary | JM00000 |
| Scotts Hall, Saint Mary | JM00000 |
| Tower Isle, Saint Mary | JMBMY24 |
| Union Hill, Saint Mary | JMBMY26 |
| Woodpark, Saint Mary | JM00000 |
| Woodside, Saint Mary | JM00000 |