Ritta Island is an island in Lake Okeechobee, Florida, near its southern shore. It was once inhabited. The settlement was situated in Palm Beach County, 5 miles (8.0 km) east of Clewiston.
Ritta Island was first inhabited around the year 1909 and first surveyed for homestead in 1917. After some heavy rains flooded the island in 1922, the island was mostly abandoned but the final blow came when in 1928 a hurricane came and washed away most or all of the infrastructure on the island.