CHESAPEAKE UTILITIES CORPORATION EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT Subsidiaries State Incorporated ------------ ------------------ Eastern Shore Natural Gas Company Delaware Sharp Energy, Inc. Delaware Chesapeake Services Company Delaware United Systems, Inc. Georgia Tri-County Gas Company, Inc. Maryland Eastern Shore Real Estate Maryland Subsidiary of Eastern Shore Natural Gas Company State Incorporated ----------------------------------------------- ------------------ Dover Exploration Company Delaware Subsidiaries of Sharp Energy, Inc. State Incorporated ---------------------------------- ------------------ Sharpgas, Inc. Delaware Sharpoil, Inc. Delaware Subsidiaries of Chesapeake Service Company State Incorporated ------------------------------------------ ------------------ Skipjack, Inc. Delaware Capital Data Systems, Inc. North Carolina Currin and Associates, Inc. North Carolina Chesapeake Investment Company Delaware