09/22/2026
We are saddened to share the passing of Gregory "Greg" Kjellberg, a lifelong Monticello native, Monticello High School Class of 1975 graduate, local business owner, and a familiar face to generations of people in our community.
For nearly 31 years, Greg owned and operated Frontier Autobody. But for many who walked through those doors, a visit was about more than getting a vehicle fixed. It meant conversation, stories, joking around, "shop talk," and hearing that unmistakable laugh.
Greg was one of those people who became part of the fabric of a small town. He grew up here, built his business here, raised his family here, and formed friendships that lasted decades.
Behind the businessman was a devoted father and grandfather, a loyal friend, and a man who loved cars, car shows, auctions, swap meets, four wheeling, cooking, and making people laugh.
Those who knew Greg will remember his big personality, his generosity, his sense of humor, and especially that great, boisterous laugh.
Our thoughts are with Greg's children, April and Aaron, his seven grandchildren, the entire Kjellberg family, and the many friends whose lives he touched.
Thank you, Greg, for the memories you leave behind in Monticello.
Greg's complete obituary and Celebration of Life information are included below.
Gregory "Greg" Kjellberg
March 18, 1957 - September 11, 2026
Gregory Keith Kjellberg, age 69 of Monticello, MN passed away Friday morning, September 11th, 2026.
Greg was born at Hart Hospital in Monticello, MN on March 18th, 1957, to Joanne and Keith Kjellberg. He graduated from Monticello High School, class of 1975, later attending St. Cloud vocational school studying autobody. He worked at various other autobody businesses over the years, later opening his own business, reflecting his passion for cars, Frontier Autobody, owned and operated since January 1, 1996. His passion for fixing cars stemming to his childhood.
Greg enjoyed his customer interactions, where business soon turned to long conversations, laughter and joking around. He enjoyed his buddies and longtime friends who stopped daily for "shop talk".
Some of Greg's great joys were his children, April and Aaron Kjellberg and his 7 grandchildren. He loved picking on and teasing his children and the grandchildren, chasing the kids around stating he was going to eat their gizzards and toes, with his great big boisterous laugh. He was a child at heart himself. He was so proud of his children and his grandchildren. He enjoyed socializing and could talk for hours, car shows, auctions, swap meets, four wheeling and making new recipes and bragging about how wonderful they had turned out.
Greg was a wonderful father, grandfather, brother, uncle, and friend. He was always willing to offer a helping hand to anyone who needed it. He had a powerful presence, and an amazing laugh. He was our rock, always knowing what to say and what to do when advice was needed, of course with a bit of humor behind his reasonings.
He is survived by his two children April Kjellberg, and Aaron Kjellberg (Ashley); Grandchildren: Rayna, Rylan, Reagan, Ryker, Randyn Moss, Jayden and Brayden Kjellberg. Siblings; Gary Kjellberg (Barb), Linda Kjellberg-Yonak, David Kjellberg. Nieces: Allison Florek, Andrea Kjellberg, Madison Nowling Kjellberg. Stepfather: Robert Marquette. Aunt: Kacey Kjellberg; Along with other relatives, and many very close friends.
He is proceeded in death by his parents; Joanne Marquette, and Keith Kjellberg. Brother-in-law and longtime friend Kevin Yonak. Uncles; Kurt Kjellberg, Kevin Kjellberg, and Kent Kjellberg. Aunt: Diane Kjellberg. Cousin: Kathy Kjellberg and many close friends.
All family and friends are invited to a celebration of life on Saturday, November 14th, 2026 from 11:00 a.m. to 4:00 p.m. at the VFW Post 8731, 713 S. Cedar St, Monticello, Mn 55362