Nicor Gas
Company


Form
10-K


Exhibit
24.01








POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ ROBERT M. BEAVERS,
JR.


Robert M.
Beavers, Jr.





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ BRUCE P.
BICKNER


Bruce P.
Bickner





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ JOHN H. BIRDSALL,
III


John H.
Birdsall, III





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ NORMAN R.
BOBINS


Norman R.
Bobins





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ THOMAS A.
DONAHOE


Thomas A.
Donahoe





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ BRENDA J.
GAINES


Brenda J.
Gaines





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ RAYMOND A.
JEAN


Raymond
A. Jean





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ DENNIS J.
KELLER


Dennis J.
Keller





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ R. EDEN
MARTIN


R. Eden
Martin





POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ GEORGIA R.
NELSON


Georgia
R. Nelson







POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ JOHN
RAU


John
Rau







POWER OF
ATTORNEY








The
undersigned, a Director, Officer, or Director and Officer of Nicor Inc. and
Northern Illinois Gas Company (doing business as Nicor Gas Company), Illinois
corporations, hereby authorizes any officer of Nicor Inc. and each of them, to
execute in the name and on behalf of the undersigned as such Director, Officer,
or Director and Officer, the 2007 Annual Report on Form 10-K of Nicor Inc. and
Nicor Gas Company (and any amendments thereto) to be filed pursuant to the
Securities Exchange Act of 1934.











Date:  February
21, 2008

















/s/ JOHN F.
RIORDAN


John F.
Riordan