Exhibit 21 SUBSIDIARIES OF REGISTRANT AS OF DECEMBER 31, 1995 % of Voting Securities State of Owned by Parent Relationship Incorporation --------------- ------------ ------------- South Jersey Industries, Inc. Registrant Parent New Jersey South Jersey Gas Company (4) 99.78 (1) New Jersey Energy & Minerals, Inc. (4) 100 (1) New Jersey The Morie Company, Inc. (4) 100 (2) New Jersey South Jersey Fuel, Inc. (4) 100 (2) New Jersey South Jersey Energy Company (4) 100 (1) New Jersey R&T Group, Inc. (4) 100 (1) New Jersey R and T Castellini Company, Inc. (4) 100 (3) New Jersey Cape Atlantic Crane Company, Inc. (4) 100 (3) New Jersey S.W. Downer, Jr. Company, Inc. (4) 100 (3) New Jersey Onshore Construction Company, Inc. (4) 100 (3) New Jersey R & T Castellini Construction Company, Inc. (4) 100 (3) Delaware <FN> (1) Subsidiary of South Jersey Industries, Inc. (2) Subsidiary of Energy & Minerals, Inc. (3) Subsidiary of R&T Group, Inc. (4) Subsidiary included in financial statements </FN>