Mike Underberg Obituary
The memory of Mike Underberg of Grimes, Iowa, who passed away on March 30, 2026 at the age of 73, will forever remain in the hearts of those touched by this precious presence in their lives. 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, Augustine Underberg and Alma Underberg (Bruning); his grandson David; his stepfather Russ DeBourgh; and his sisters-in-law, Katie and Donna.
He is survived by: his wife Marilyn Koster (Kennebeck); his children, Lisa (Doug), David (Jenny), Barry (Debbie) and Lola; his grandchildren, Aaron (Alyssa), Ethan, Paige, Maybellene, Lilybelle, Cameron, Ari, Lily and Ivy; his brothers, Tom (Joann), Jim (Mary), Ted and Harlan (Paula); and his in-laws, Joyce (Randy), Phyllis, Jim, Julie, Denny (Penny), Mark, Kenny (KB), Andy (Lynn), Dean (Angela), Virginia and Sara (Jeff). He is also survived by 2 great grandchildren.
