| Official Name: | Priozersk |
| Native Name: | Priozersk |
| Pushpin Map: | Kazakhstan |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 280 |
| Pushpin Map Caption: | Location in Karagandy Province, Kazakhstan |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name: | Kazakhstan |
| Subdivision Name1: | Karaganda Region |
| Leader Title: | Akim |
| Leader Name: | Nurlan Lambekov[1] |
| Established Title: | Founded |
| Established Date: | 1956 |
| Area Total Km2: | 54.5 |
| Population As Of: | 2009 |
| Settlement Type: | closed city |
| Population Total: | 13,479 |
| Timezone Dst: | UTC+6 |
| Utc Offset Dst: | +6 |
| Coordinates: | 46.0308°N 73.7019°W |
| Postal Code Type: | Postal code |
| Postal Code: | 101100 |
| Area Code: | +7 71039 |
Priozersk is a closed city located on the northern shores of Lake Balkhash, Kazakhstan. It serves as the administrative center of Sary Shagan anti-ballistic missile testing site.
Priozersk is located in Karaganda Region (central Kazakhstan), approximately 620 kilometers to the south-east of the Karaganda and 747 kilometers from Astana. The Cambala Airport lies in the suburbs.
Population: By nationality, the city is 46% Russian, 39% Kazakh, 6% Ukrainian, and 9% other. The town is closed to visits by foreign citizens.
Tens of thousands of workers and hundreds of missile experts and army officers arrived after the Soviet government decided to establish a secret military base in the Kazakh Steppe. This testing site for the soviet missile defense system was one of such centers, which had led to construction of anti-ballistic missiles and to attain parity in the arms race between the USSR and United States.
After the Soviet Union's collapse, the Russian Federation agreed with Kazakhstan to lease some military units for 50 years. The Russian Army continues to use the base at Priozersk as the testing site for improving anti-ballistic and anti-aircraft defense systems.
According to the Köppen-Geiger climate classification system, the city of Priozersk has a steppe climate/cold semi-arid climate (BSk).