Kalvin Duppong, age 77, died Thursday, July 30, 2026, in Blessing Hospital. He was born on December 4, 1948, in Quincy, Il, the son of John and Ruth (Frese) Duppong. Kalvin married Paula Pieper on April 12, 1969. She survives.
Kalvin was a graduate of Unity High School and a proud Navy veteran, serving 1968-1972.
Kalvin was a “transportation engineer” (truck driver) having achieved 4 million miles of safe driving. In his spare time, he loved both woodworking and metal working. He also enjoyed spending time hunting, fishing, and antiquing. Kalvin loved spending time with family and friends. He never knew a stranger. He could spend hours talking about Allis-Chalmer tractors, his family, and his travels.
Kalvin was a member of St. Francis Solanus Catholic Church.
In addition to his wife, Kalvin is also survived by:
CHILDREN: a daughter Kelly Duppong and son, Clinton Duppong (Jill).
GRANDCHILDREN: Tanner and Cayley Duppong.
SIBLINGS: Jack Duppong (Kathie); Owen Duppong (Jan); Joann Fenton (Jerry); and Chris Drebes (Alan).
Kalvin was preceded in death by his parents.
Funeral services will be held on Tuesday, August 4, 2026, at 10:30 AM at Duker & Haugh Funeral Home with Mass of Christian Burial at St. Francis Solanus Catholic Church at 11:00 AM. Interment in Calvary Cemetery. Visitation will be held on Monday, August 3, 4 – 7 PM at Duker & Haugh Funeral Home. Memorials may be made to Fishing for Freedom, Wounded Warrior Project, Great River Honor Flight, or Quincy Notre Dame High School.