| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Grimstrup, Ølsted | 3310, 3320 |
| Postal/ZIP Codes in Lille Havelse, Ølsted | 3310 |
| Postal/ZIP Codes in Ølsted, Ølsted | 3300, 3310 |
| Postal/ZIP Codes in Store Havelse, Ølsted | 3310, 3600 |
| Postal/ZIP Codes in Ubberup, Ølsted | 3300, 3310, 3310 |