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