| Locality | Postal Code |
|---|---|
| Arman, Olsky raion (Армань) | 685930 |
| Balagannoe, Olsky raion (Балаганное) | 685940 |
| Gadlya, Olsky raion (Гадля) | 685910 |
| Klepka, Olsky raion (Клепка) | 685916, 685940 |
| Ola, Olsky raion (Ола) | 685910 |
| Raduzhny, Olsky raion (Радужный) | 685930 |
| Takhtoyamsk, Olsky raion (Тахтоямск) | 685922 |
| Talon, Olsky raion (Талон) | 685941 |
| Tauysk, Olsky raion (Тауйск) | 685942 |
| Yamsk, Olsky raion (Ямск) | 685910 |
| Yana, Olsky raion (Яна) | 685942 |
| Yansky, Olsky raion (Янский) | 685930 |