Clark H.

Heinzman

Clark Harrison Heinzman, 75, of Jacksonville, Illinois, died Friday, November 6, 2026, at Jacksonville Memorial Hospital.

He was born June 7, 1951, in Salem, the son of Ray and Lola Mae (Sieber) Heinzman. Clark married Joan Beckemeyer on June 17, 1995, and they later divorced. After twenty-eight years of marriage, Clark and Joan remained good friends.

He is survived by Joan Heinzman, brother, John Heinzman, and his caretaker and friend, Jenny Rentschler; all of Jacksonville. Clark was preceded in death by his parents and sister, Jane Heinzman.

Clark graduated from Salem High School, where he grew up, and later attended Illinois College in Jacksonville. He owned his own business, Heinzman & Associates, in Jacksonville, a manufacturing management consulting firm for fishing gear. He and Joan were members of First Christian Church, and he was also a member of the Elks Lodge, both in Jacksonville.

Clark was a dedicated Illini fan, as he usually had season tickets to basketball and football games. He was also an avid fisherman and hunter. He enjoyed hunting all in seasons and had also fished in several tournaments. Clark loved all his dogs, but his favorite was Merri. Clark was a very generous person and has had many angels helping him and Joan through these past couple of years.

A memorial service will be held 3 PM Monday, November 16, 2026, with Joan meeting friends from 1 – 3 PM. Memorial donations are suggested to First Chirstian Church of Jacksonville. The Buchanan & Cody Funeral Home in Jacksonville is assisting the family with cremation and services.