Island Lake is a small alpine lake in Elmore County, Idaho, United States, located in the Sawtooth Mountains in the Sawtooth National Recreation Area.

No trails lead to Island Lake although Sawtooth National Forest trails 459, 494, and 458 pass relatively close by.

The lake gets its name from one small 100 ft (30 m) long island in the southern part of the lake.

Snowbank Lake is 175 ft (53 m) upstream of Island Lake while the Hole is 0.17 mi (0.27 km) downstream.

This Elmore County, Idaho state location article is a stub.