| Locality | Post Code |
|---|---|
| Spicy Hill, Trelawny | JM00000 |
| Spring Garden, Trelawny | JM00000 |
| St. Vincent, Trelawny | JM00000 |
| Stettin, Trelawny | JM00000 |
| Stewart Town, Trelawny | JMCTY14 |
| Troy, Trelawny | JMCTY15 |
| Ulster Spring, Trelawny | JMCTY16 |
| Wait-a-Bit, Trelawny | JMCTY17 |
| Wakefield, Trelawny | JMCTY18 |
| Warsop, Trelawny | JMCTY19 |
| Wilson's Run, Trelawny | JM00000 |
| Wirefence, Trelawny | JM00000 |