| Lake Yonozero | |
| Location: | Kola Peninsula, Murmansk Oblast |
| Pushpin Map: | Russia Murmansk Oblast#Russia |
| Outflow: | Varzina River |
| Basin Countries: | Russia |
| Area: | 94.4km2 |
Lake Yonozero is a large freshwater lake on the Kola Peninsula, Murmansk Oblast, Russia. It has an area of 94.4km2 (about 100abbr=onNaNabbr=on with all the islands). Numerous small, uninhabited islands are found in the lake. Varzina River flows from the lake. Lake Yonozero marks the northern border of the Murmansk Tundra Reserve.[1] The three-spined stickleback can be found in the lake, as well as in other surrounding lakes and rivers in eastern Murman.[2]