A lifelong Kansan, Dennis Moore was educated in Wichita public schools, and graduated from the University of Kansas and Washburn University School of Law. After service in the U.S. Army, Congressman Moore began his legal career in the Kansas Attorney General's office, and moved to private practice in 1973.

In 1976, Dennis Moore was elected District Attorney in Johnson County, and was re-elected to two more four-year terms. After returning to private practice, Dennis Moore was twice elected to the Johnson County Community College Board of Trustees. He was instrumental in the founding of Safehome (a shelter for battered women and children); the Coalition for Prevention of Child Abuse, which later became Sunflower House; and the Johnson County chapter of Court Appointed Special Advocates (or CASA).

On November 3, 1998, Dennis Moore was elected as Third District Congressman in the U.S. House, where he serves o­n the House Financial Services Committee, the Budget Committee, and the Science Committee. He was re-elected in 2000, 2002 and 2004.

Moore lives in Lenexa with his wife Stephene, a registered nurse, close to their seven grandchildren. He returns home to Kansas virtually every weekend to meet with community groups and area residents.