He was born on March 22, 1947, in Dixon, IL, the son of Edgar and Marian (Gilbert) Deets. David graduated from DePauw University in Greencastle, IN, and Loyola University Stritch School of Medicine. He was a well-loved physician/general surgeon at KSB from 1977 until 2018.
David was a member of St. Patrick Catholic Church in Dixon, served in the Illinois House of Representatives, the Lee County Board, was a member of Ducks Unlimited, the National Rifle Association, and was a deputy Lee County Coroner. He also served on the Illinois State Medical Society Review Board.
He married Kathryne Olson, and she preceded him in death in 1981. David later married Jan Welker Gunnon on April 28, 2001. He was preceded in death by his parents.
David is survived by his wife, Jan; children Christopher (Jennifer) Deets of Edina, MN, Amy (Joseph) Jasmon of St. Johns, FL, David (Lara Cooper) Deets of Hanover, PA, Edward (McAley) Deets of Dixon; stepchildren Dr. Christopher (Aluinn) Gunnon, DVM, of Dixon, Jeffrey (Jennifer) Gunnon of Grand Detour, and Katherine (Joshua) McNitt of Dixon; 17 grandchildren; and 7 great-grandchildren, with one due in June.
Funeral services will be held on Saturday, May 23, 2026, at 11:00 a.m. at St. Patrick Catholic Church in Dixon. Burial will follow at Oakwood Cemetery in Dixon. Visitation will be held on Saturday, May 23, 2026, from 9:00 a.m. to 10:45 a.m. at St. Patrick Catholic Church in Dixon. Memorial donations can be directed to St. Patrick Catholic Church in Dixon.
