Lake Okeechobee is the largest freshwater lake in Florida. Its area is 730 square miles. It is 28.95 miles in width. It is 35.7 miles in length. The average depth is 9 feet. Inflow into the lake is the Kissimmee River and Fisheating Creek. Outflow is the Everglades, Caloosahatchee River, and Saint Lucie River. The lake is located in Glades, Okeechobee, Martin, Palm Beach, and Hendry Countries.