Longview Lake is a 930-acre (3.8 km2) freshwater reservoir in parts of Kansas City, Lee's Summit, and Grandview, all in Jackson County, Missouri. The reservoir is part of U.S. Army Corps of Engineers Little Blue River Project for flood control, recreation, and fish and wildlife conservation. The lake is located in the 4,852-acre (20 km2) Longview Lake Park, which is managed by Jackson County Parks and Recreation.