Lake Bracken is a reservoir in Galesburg, Knox County, Illinois, United States. Managed by the Lake Bracken Country Club, the lake was formed in 1921 with the damming of Brush Creek. It is part of the Spoon River drainage basin, and has a surface area of 172 acres (70 ha). Its "overall resource quality" was assessed as "fair" in 1996 by the Illinois Environmental Protection Agency.