Ozyorsk () or Ozersk () is the name of several inhabited localities in Russia.

1. Urban localities

2. Ozyorsk, Chelyabinsk Oblast, a town in Chelyabinsk Oblast

3. Ozyorsk, Kaliningrad Oblast, a town in Ozyorsky District of Kaliningrad Oblast

4. Rural localities

5. Ozersk, Samara Oblast, a settlement in Bolsheglushitsky District of Samara Oblast