| Postal Code | 10-830 |
| Postal Code Name | Olsztyn |
| Voivodeship | Warmian-Masurian Voivodeship |
| County | Olsztyn |
| Timezone | Central European Time (CET) |
| Adjacent Postal Codes | 10-805 10-806 10-812 10-813 10-816 10-817 10-818 10-819 10-822 10-823 10-824 10-825 10-828 10-829 10-831 10-832 10-833 10-838 10-839 10-842 10-843 10-845 10-846 10-847 10-848 10-849 10-850 10-851 10-859 |