Trout Lake is an unincorporated community and census-designated place (CDP) in Klickitat County, Washington, United States.

The town is notable for its organic dairy and herb farms, and as an access point to Mount Adams and the Gifford Pinchot National Forest.

Trout Lake is in the northwest corner of Klickitat County, 14 miles (23 km) south of the 12,276-foot (3,742 m) summit of Mount Adams.

As of the 2010 United States Census,[8] there were 557 people, 224 households, and 171 families residing in the CDP.

In 2011, the American Community Survey estimated a median income of $31,563 (adjusted for inflation, 2011 dollars) for an individual, and $56,250 for a household.