Lake Jacomo /dʒəˈkoʊmoʊ/ is a 970-acre (3.9 km2) freshwater reservoir located near Blue Springs in Jackson County, Missouri.

The Presiding Judge of Jackson County, Harry S. Truman, requested that a study be done for a potential park.

It was 20 years later that local voters approved a bond issue to create and develop the lake.

Activities at Lake Jacomo include sailing, sailboat racing, pontoon boating, fishing, and hiking.

Common fish found in the lake include crappie, bluegill, largemouth bass, carp, catfish, hybrid striped bass, green sunfish, and walleye.