Lake Ronkonkoma (lake)
 Lake Ronkonkoma Long Island's largest freshwater lake is in Suffolk County New York United States and has a circumference of about 2 miles (3.2 km) and is 0.65 miles (1.05 km) across on average.A kettle lake formed by retreating glaciers it is owned by the Town of Islip under the terms of the Nichols Patent. The land around it is controlled by three town governments - Smithtown Islip and Brookhaven.