| St. George Lake | |
| Coords: | 44.3875°N -69.3358°W |
| Outflow: | St. George River |
| Basin Countries: | United States |
| Length: | 2.5miles |
| Width: | 1.2miles |
| Area: | 1017acres |
| Max-Depth: | 65feet |
| Elevation: | 505feet |
| Islands: | Green, Hawaii 2, Millstone, Pratt |
| Pushpin Map: | Maine |
| Pushpin Map Alt: | Location of St. George Lake in Maine, USA. |
| Pushpin Map Caption: | Location in Maine |
St. George Lake is the fourth largest lake in Waldo County, Maine, United States. It is in the township of Liberty, on the western side of Waldo County. Lake St. George State Park is on the northwest shore of the lake. It contains the island of Hawaii 2.
The lake is populated with at least 14 species of fish, including salmon, brook trout (stocked since 1980), and smallmouth bass.