He was a 1995 graduate of DeSales High School.
Sean was preceded in death by his mother, Mary Louise (Willinghurst) Kilkelly.
Survivors include his father, Charles Patrick Kilkelly; his sister, Shannon Kilkelly Kelting (Chris); his brother, Kevin KilKelly (Cindy); and two nieces, a nephew and a great-nephew.
Cremation was chosen and entrusted with Schoppenhorst Funeral Home and Cremation Services at Okolona.