Diamond Lake is an unincorporated community in Pend Oreille County, Washington, United States located southwest of Newport, Washington.

Diamond Lake offers year-round fishing and has a population of largemouth bass, yellow perch, bullheads, rainbow and brown trout.

A cooperative net pen project releases 12,500 rainbow and brown trout.

Approximately 200 rainbow trout surplus broodstock are farmed in Diamond Lake annually.

This Pend Oreille County, Washington state location article is a stub.