Diamond Lake is a natural body of water in the southern part of the U.S. state of Oregon.

From there, water flows via Diamond Lake Creek into the North Umpqua River and ultimately to the Pacific Ocean.

Diamond was a pioneer settler of Coburg, Oregon, and part of a party opening a road between the Middle Fork Willamette River and Idaho as an immigration route.

These fish, illegally introduced to the lake, quickly multiplied and negatively affected the sport fishery.

[7] The ODFW has captured golden shiners, another invasive species of bait fish illegally introduced to the lake.

Although shiners are less successful than tui chubs at multiplying in Diamond Lake, the ODFW works to remove them and to discourage more from being added.

Campground features include picnic tables, restrooms, showers, and garbage bins; some have hookups for recreational vehicles.

Winter sports include snowmobiling, Nordic and Alpine skiing, inner tubing and sled dog racing.