Imogene Lake is an alpine lake in Custer County, Idaho, United States, located in the Sawtooth Mountains in the Sawtooth National Recreation Area.

The lake is approximately 15 miles (24 km) southwest of Stanley.

The lake can be accessed from State Highway 75 in the Sawtooth Valley.

There is a trailhead downstream of Hell Roaring Lake at the end of Sawtooth National Forest road 097, which is a high clearance road.

There are about three (depending on water levels) very small islands in the lake, the largest of which is less than 200 feet (61 m) long.