| East Sidney Lake | |
| Pushpin Map: | New York |
| Pushpin Map Caption: | Location of East Sidney Lake within New York |
| Location: | Delaware County, New York |
| Coords: | 42.3272°N -75.2125°W |
| Type: | Reservoir |
| Inflow: | Ouleout Creek |
| Outflow: | Ouleout Creek |
| Area: | 201acres |
| Elevation: | [1] |
| Cities: | Unadilla |
East Sidney Lake is a small reservoir located east of Unadilla in Delaware County, New York. The Ouleout Creek flows through East Sidney Lake.