Crump Lake is a shallow lake in the Warner Valley of eastern Lake County, Oregon, United States. The lake covers 7,680 acres (31.1 km2). It is the largest of the Warner Lakes system. The lake is named for pioneer rancher Thomas Crump. Crump Lake is owned by the Oregon Department of State Lands. Much of the land around the lake is administered by the Bureau of Land Management and the United States Fish and Wildlife Service. The lake and the surrounding wetlands support a wide variety of birds and other wildlife. Recreational opportunities on or near Crump Lake include fishing, bird watching, and camping.