EXHIBIT 21

Subsidiaries of

American Electric Power Company, Inc.

As of December 31, 2010

The voting stock of each company shown indented is owned by the company immediately above which is not indented to the same degree.  Subsidiaries not indented are directly owned by American Electric Power Company, Inc.

Name of Company	Location of Incorporation	Percentage of Voting Securities Owned by Immediate Parent
American Electric Power Company, Inc.	New York
American Electric Power Service Corporation	New York		100.0
AEP C&I Company, LLC	Delaware		100.0
AEP Coal, Inc.	Nevada		100.0
AEP Credit, Inc.	Delaware		100.0
AEP Fiber Venture, LLC	Virginia		100.0
AEP Generating Company	Ohio		100.0
AEP Investments, Inc.	Ohio		100.0
AEP Nonutility Funding LLC	Delaware		100.0
AEP Pro Serv, Inc.	Ohio		100.0
AEP Resources, Inc.	Ohio		100.0
AEP T&D Services, LLC	Delaware		100.0
AEP Transmission Holding Company, LLC	Delaware		100.0
AEP Utilities, Inc.	Delaware		100.0
AEP Texas Central Company	Texas		100.0
AEP Texas Central Transition Funding LLC	Delaware		100.0
AEP Texas Central Transition Funding II LLC	Delaware		100.0
AEP Texas North Company	Texas		100.0
AEP Texas North Generation Company LLC	Delaware		100.0
CSW Energy, Inc.	Texas		100.0
CSW Energy Services, Inc.	Delaware		100.0
Electric Transmission Texas, LLC	Delaware		50.0	(a)
AEP Utility Funding LLC	Delaware		100.0
Appalachian Power Company	Virginia		98.7	(b)
Cedar Coal Co.	West Virginia		100.0
Central Appalachian Coal Company	West Virginia		100.0
Central Coal Company	West Virginia		50.0	(c)
Southern Appalachian Coal Company	West Virginia		100.0
Columbus Southern Power Company	Ohio		100.0
Conesville Coal Preparation Company	Ohio		100.0
Ohio Valley Electric Corporation	Ohio		4.3	(d)
Indiana-Kentucky Electric Corporation	Indiana		100.0
Franklin Real Estate Company	Pennsylvania		100.0
Indiana Michigan Power Company	Indiana		100.0
Blackhawk Coal Company	Utah		100.0
Price River Coal Company	Indiana		100.0
Kentucky Power Company	Kentucky		100.0
Kingsport Power Company	Virginia		100.0
Ohio Power Company	Ohio		99.4	(e)
Cardinal Operating Company	Ohio		50.0	(f)
Central Coal Company	West Virginia		50.0	(c)
OP Gavin, LLC	Delaware		100.0
Ohio Valley Electric Corporation	Ohio		39.2	(d)
Indiana-Kentucky Electric Corporation	Indiana		100.0
Power Tree Carbon Company, LLC	Delaware		9.2	(g)
Public Service Company of Oklahoma	Oklahoma		99.5	(h)
Southwestern Electric Power Company	Delaware		99.4	(i)
Dolet Hills Lignite Company, LLC	Delaware		100.0
Oxbow Lignite Company, LLC	Delaware		50.0	(j)
Southwestern Arkansas Utilities Corporation	Arkansas		100.0
SWEPCo Capital Trust I	Delaware		100.0
The Arklahoma Corporation	Arkansas		47.6	(k)
Wheeling Power Company	West Virginia		100.0

NOTES:

(a)	Owned 50% by AEP Utilities, Inc; the other 50% is owned by a nonaffiliated company.
(b)	13,499,500 shares of Common Stock, all owned by parent, have one vote each and 177,465 shares of Preferred Stock, all owned by the public, have one vote each.
(c)	Owned 50% by Appalachian Power Company and 50% by Ohio Power Company.
(d)	American Electric Power Company, Inc. and Columbus Southern Power Company own 39.2% and 4.3% of the stock, respectively, and the remaining 56.5% is owned by nonaffiliated companies.
(e)	27,952,473 shares of Common Stock, all owned by parent, have one vote each and 166,158 shares of Preferred Stock, all owned by the public, have one vote each.
(f)	Ohio Power Company owns 50% of the Common Stock; the other 50% is owned by a nonaffiliated company.
(g)	The remaining 90.8% is owned by nonaffiliated companies.
(h)	9,013,000 shares of Common Stock, all owned by parent, have one vote each and 48,818 shares of Preferred Stock, all owned by the public, have one vote each.
(i)	7,536,640 shares of Common Stock, all owned by parent, have one vote each and 46,958 shares of Preferred Stock all owned by the public, have one vote each.
(j)	Southwestern Electric Power Company owns 50% of the Common Stock; the other 50% is owned by a nonaffiliated company.
(k)	Southwestern Electric Power Company owns 47.6% of the Common Stock; the other 52.4% is owned by nonaffiliated companies.