Exhibit 21
SOUTH JERSEY INDUSTRIES, INC.
SUBSIDIARIES OF REGISTRANT
AS OF DECEMBER 31, 2005
	Percentage of
	Voting Securities				State of
	Owned by Parent		Relationship		Incorporation
South Jersey Industries, Inc.	Registrant		Parent		New Jersey
South Jersey Gas Company (5)	100		(1)		New Jersey
Marina Energy LLC (5)		100		(1)		New Jersey
South Jersey Energy Company (5)		100		(1)		New Jersey
South Jersey Resources Group, LLC (5)		100		(1)		Delaware
South Jersey Energy Service Plus, LLC (5)		100		(1)		New Jersey
SJ EnerTrade, Inc. (5)		100		(2)		New Jersey
Energy & Minerals, Inc. (5)		100		(1)		New Jersey
R&T Group, Inc. (5)		100		(1)		New Jersey
South Jersey Fuel, Inc. (5)		100		(3)		New Jersey
South Jersey Energy Solutions, LLC		100		(1)		New Jersey
SJI Services, LLC		100		(1)		New Jersey
AC Landfill Energy, LLC (5)		51		(4)		New Jersey
WC Landfill Energy, LLC (5)		51		(4)		New Jersey
(1) Subsidiary of South Jersey Industries, Inc.
(2) Subsidiary of South Jersey Energy Company
(3) Subsidiary of Energy & Minerals, Inc.
(4) Subsidiary of Marina Energy LLC
(5) Subsidiary included in financial statements