The following are the zip codes in the municipalities of Siquijor.
| Region | Provinces | City/Municipality | Zip Code |
| NIR (Negros Island Region) | Siquijor | Enrile Villanueva | 6230 |
| NIR (Negros Island Region) | Siquijor | Larena | 6226 |
| NIR (Negros Island Region) | Siquijor | Lazi | 6228 |
| NIR (Negros Island Region) | Siquijor | Maria | 6229 |
| NIR (Negros Island Region) | Siquijor | San Juan | 6227 |
| NIR (Negros Island Region) | Siquijor | Siquijor | 6225 |
