Ozyorsk (Russian: Озёрск) or Ozersk (Озерск) is the name of several inhabited localities in Russia.
- Urban localities
- Ozyorsk, Chelyabinsk Oblast, a town in Chelyabinsk Oblast
- Ozyorsk, Kaliningrad Oblast, a town in Ozyorsky District of Kaliningrad Oblast
- Rural localities
- Ozersk, Samara Oblast, a settlement in Bolsheglushitsky District of Samara Oblast