[Marathon Oil Corporation Logo]	Richard J. Kolencik Sr. Group Counsel and Assistant Secretary
	5555 San Felipe (77056-2799) P.O. Box 4813 (77210-4813) Houston, Texas Telephone 713/296-2535 E-Mail:  rjkolencik@marathonoil.com

April 16, 2010

Mr. John Lucas

Attorney Advisor

United States Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N. E.

Washington, D.C. 20549

Re:	Marathon Oil Corporation
	Response to SEC Letter dated April 8, 2010
	Form 10-K for the Fiscal Year Ended December 31, 2009
	Filed February 26, 2010
	File No. 001-05153

Dear Mr. Lucas:

This letter is to confirm our conversation today that Marathon Oil Corporation’s response

letter to the April 8, 2010 comment letter of the U.S. Securities and Exchange Commission will be due on or before Friday, April 30, 2010.  Thank you for your

consideration.

Very truly yours,

/s/ Richard J. Kolencik

Richard J. Kolencik