David K. Overstreet was born on January 14, 1966, in Mt. Vernon, Illinois. He received his Bachelor of Science degree from Lipscomb University and his Juris Doctor degree from the University of Tennessee. He practiced law with Miller, Tracy, Braun & Wilson, Ltd of Monticello, Illinois, from 1991 to 1992, with the Law Office of Peter G. Angelos of Knoxville, Tennessee, from 1992 to 1995, and with Mitchell, Neubauer, Shaw & Hanson, P.C., Neubauer, Hanson & Overstreet, P.C., and Neubauer & Overstreet, P.C. of Mt. Vernon, Illinois, from 1995 until his appointment to the Second Judicial Circuit Court in 2007. After being appointed to the bench, Justice Overstreet successfully ran for election in 2008 and was retained in 2014. He was assigned to the Fifth District Appellate Court in 2017 and successfully ran for election to the Appellate Court in 2018. Justice Overstreet was elected to the Illinois Supreme Court from the Fifth Judicial District in 2020.

Justice Overstreet currently serves on the Illinois Judicial Conference, as the vice-chair of the Public Relations Task Force of the Illinois Judicial Conference, and is the Supreme Court Liaison to the Supreme Court Commission on Access to Justice, Supreme Court Committee on Character and Fitness, and the Supreme Court E-Business Policy Advisory Board. Besides serving as an officer of the Illinois Judges Association, Justice Overstreet previously served on the Board of Directors and Executive Committee of the IJA. Justice Overstreet also previously served on the Illinois Supreme Court Committee on Judicial Education, the Illinois Judicial College, and the Illinois Supreme Court Judicial Mentoring Committee, and he was the co-chair of the Family Law track of the Illinois Judicial Education Conference 2020. Justice Overstreet served on the Illinois Supreme Court Strategic Planning Committee, the Illinois Supreme Court Committee on Juvenile Justice, as chair of the Second Judicial Circuit’s professionalism committee and program administrator of its lawyer-to-lawyer mentoring program, and as President of the Jefferson County Bar Association. Justice Overstreet and his wife Suzanne have three children.