Catherine Ann Warren (born February 12, 1984) is a beauty queen from Lake Forest, Illinois and winner of Miss Illinois USA 2006, who has competed in the Miss USA pageant and the Miss International (USA) pageant.
Warren won the Miss Illinois USA 2006 title the fourth time she took part, having competed in 2003, placed 1st runner-up in 2004 and 2nd runner-up in 2005. On April 21, 2006 she competed for the title of Miss USA 2006 in Baltimore, Maryland and placed in the top 15. Warren was one of 26 Miss USA Delegates who appeared on Deal or No Deal in 2006.
Warren graduated from Lake Forest High School in 2002 and attended the University of Kansas. She is currently a student at DePaul University.
She is involved in promoting community services, volunteering and mentoring, and has created websites to help others better understand the need for involvement in this process.
Warren's hobbies and interests include travelling, reading fiction novels, shopping, scrapbooking and watching college basketball.
In March 2007 Warren appeared on The Bachelor: Officer and a Gentleman. but was eliminated in the first episode.