Gary Lee Kosterman Obituary
The memory of Gary Lee Kosterman of Oak Creek, Wisconsin, who passed away on January 13, 2026 at the age of 73, will forever remain in the hearts of those touched by this precious presence in their lives. Leave a sympathy message to the family on the memorial page of Gary Lee Kosterman to pay them a last tribute.
He was predeceased by: his parents, Edward Kosterman and Florence Kosterman; his siblings, Bonnie and Daniel; and his brother-in-law Kenny (Kathleen).
He is survived by: his sons, Jeremy (Mary), Jason (Starr) and Adam (Brittany); his grandchildren, Taylor, Anna, Ryder, Hunter and Cassius; and his siblings, Linda Heizler, Deb Ringersma (Don), Art Kosterman (Sue) and Connie DeLasky (Dan). He is also survived by his family, especially cheering on his children and grandchildren.
In Lieu of flowers, memorials to the Alzheimer's Foundation of America at alzfdn.org.
