EXHIBIT 21


                               AGL RESOURCES INC.
                 FORM 10-K FOR THE YEAR ENDED SEPTEMBER 30, 1997


Subsidiaries of the Registrant

         AGL Resources has five active wholly owned  subsidiaries and ten active
second tier subsidiaries.  AGL Resources' wholly owned subsidiaries are: Atlanta
Gas Light Company; AGL Resources Service Company; AGL Energy Services, Inc.; AGL
Investments, Inc.; and The Energy Spring, Inc.

         Each of AGL Resources,  its five active wholly owned  subsidiaries  and
the ten active  second  tier  subsidiaries  are  Georgia  corporations  with the
exception of Chattanooga Gas Company which is a Tennessee corporation. Following
is a listing  of the first  tier  subsidiaries  and their  related  second  tier
subsidiaries:

Atlanta Gas Light Company:

         Chattanooga Gas Company

AGL Energy Services, Inc.

         Georgia Gas Company

AGL Investments, Inc.

         AGL Consumer Services, Inc.
         AGL Energy Wise Services, Inc.
         AGL Gas Marketing, Inc.
         AGL Power Services, Inc.
         AGL Propane, Inc.
         Georgia Energy Company
         Trustees Investments, Inc.

The Energy Spring, Inc.

         TES, Inc.