Dennis J. Kowalski, age 73 of Diamond, IL passed away peacefully on Friday, October 16, 2026 at Lightways Hospice in Joliet.

He was born on August 26, 1953 in Chicago, IL to Stanley and Jessie (Macudzinski) Kowalski. He grew up in Chicago, graduating from T.F. North High School in Calumet City. He then attended and played basketball for Western New Mexico University in Silver City New Mexico. Dennis was a process operator for Loders/Bunge, retiring after a long career. Following a longtime courtship, he married Barbara Ward on August 7, 2017 in Florida.

Dennis, or “Big D” as he was called, was a true character. He was always laughing and joking. His favorite foods in life were Pepsi, popsicles and frozen grapes. He enjoyed puzzles and had a room dedicated to that pursuit. He was a wordsmith and had a colorful way with the English language. Other interests of Dennis’ were bowling, sports memorabilia, the Green Bay Packers, the Chicago White Sox and the Weather Channel. He could be found taking some alone moments in his garage relaxing. Spending time with the grandkids was a favorite of Dennis’, whether going on vacations or watching them in the pool on his backyard swing. Most of all, Dennis adored Barbara and their family. His heart was as big as he was.

He is survived by his longtime love and wife, Barbara; his daughters, Kenna (Nick Buffano) Kowalski and Nikki Kowalski; his bonus daughters, Rachel (Jesse) Hall, Katie Reddington and Lauren Reddington; his 5 grandchildren, Keenan Browder Jr., Bentlee Reddington, Maci Reddington, Paislee Hall, Willow Hall and one on the way and his sister, Marcia (John) Cipich.

He was preceded in death by his parents, his brother, Tommy Kowalski and his sister, Barbara (the late Mike) Ryan.

Visitation will be from 4:00 until 7:00 on Friday, October 23, 2026 at the Ferrari Funeral Chapel, 1044 Ferrari Drive, Coal City, IL 60416.

Cremation rites will be accorded following services.

Memorial donations may be made to Lightways Hospice and Serious Illness Care.

Family and friends are encouraged to sign the online guestbook at www.ferrarifuneral.com

Ferrari Funeral Services of Coal City are entrusted with arrangements.