Lake Jacomo /dʒəˈkoʊmoʊ/ is a 970-acre (3.9 km2) freshwater reservoir located near Blue Springs in Jackson County, Missouri. It is located in the 7,809-acre (32 km2) Fleming Park, which is managed by the Jackson County Parks and Recreation Association. The idea for the lake began in 1932. The Presiding Judge of Jackson County, Harry S. Truman, requested that a study be done for a potential park. However, nothing was done at that time. It was 20 years later that local voters approved a bond issue to create and develop the lake. Lake Jacomo officially opened on May 30, 1959.