Gary Lee Determan Obituary
With heavy hearts, we announce the death of Gary Lee Determan (Sioux City, Iowa), born in Carroll, Iowa, who passed away on December 1, 2025 at the age of 83. Family and friends are welcome to leave their condolences on this memorial page and share them with the family.
He was predeceased by: his parents, Melvin Determan and Phyllis Determan. He is survived by: his children, Jon (Liz), Jill (Philip McCaulley) and Nick; his grandchildren, Ali, Drew, Seth, Jackson, Henry, Trice and Ecyla; his wife Janice Polking; and his siblings, Mary O'Keeffe, Jeanne Boeckman and Jim Determan (Jean).
Visitation was held on Wednesday, December 3rd 2025 from 5:00 PM to 7:00 PM at the Meyer Brothers Morningside Chapel (6200 Morningside Ave, Sioux City, IA 51106). A vigil service was held on Wednesday, December 3rd 2025 from 7:00 PM to 7:30 PM at the same location. A Mass was held on Thursday, December 4th 2025 from 11:30 AM to 12:30 PM at the Mater Dei Parish- Immaculate Conception (1212 Morningside Ave, Sioux City, IA 51106).
In lieu of flowers, memorials in Gary's name may be made to Bishop Heelan Catholic Schools.
