CHICAGO, IL – January 18, 2008 – Aon Corporation (NYSE: AOC) today declared a quarterly cash dividend of $0.15 per common share.  The cash dividend is payable on February 14, 2008 to common stockholders of record at the close of business on February 1, 2008. 

About Aon

Aon Corporation (NYSE:AOC) is the leading global provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting.  Through its 43,000 professionals worldwide, Aon readily delivers distinctive client value via innovative and effective risk management and workforce productivity solutions.  Our industry-leading global resources, technical expertise and industry knowledge are delivered locally through more than 500 offices in more than 120 countries.  Aon was ranked by A.M. Best as the number one global insurance brokerage in 2007 based on brokerage revenues, and voted best insurance intermediary, best reinsurance intermediary, and best employee benefits consulting firm in 2007 by the readers of Business Insurance.  For more information on Aon, log onto www.aon.com.