DeWitt County, Illinois, home to one of the largest lakes in the state of Illinois! Clinton Lake is a wonderful place to go camping, fishing, boating, swimming and enjoy many other water sporting activities within it's 5,000 acre boundaries. Clinton Lake is a rustic, full facility center for aquatic recreation and camping (217-935-8722). It is a haven for sailing enthusiasts and a "hot spot" for fishermen as well as swimmers and beach bathers.