Keith Charles Mattson

Keith Charles Mattson passed away unexpectedly at St. Vincent Hospital in Green Bay, January 27, 2026, after a medical issue at home. Keith was born August 15, 1989, son to Lorie and Jeffrey Mattson.

Keith is survived by his Dad, Loren Madden; brother, Jason Seidl (Stacy); sisters, Nikki Ryberg (Kris), Jenna Madden; girlfriend Ashley Day; aunts and uncles: Debbie (Kevin) Marg, Barb (James) Reinke, Dennis (Karen) Seidl, Ken (Jean) Seidl; nieces and nephews: McKenna, Kailyn, Jameson, Antwon, Anyela and Ariana.

Keith was preceded in death by his parents, Lorie Madden and Jeffrey Mattson; grandparents; great aunts and uncles.

Keith worked for Indianapolis Fruit for several years where he made many great friends. He has so many friends that he made in his short 36 years and we appreciate all of them for taking the time to visit him while in the hospital. Keith enjoyed being competitive with darts, bowling, bags, dice and he also like playing baseball, softball, basketball, watching football and 4-wheeling. Keith also loved to work with his Uncle Kevin repairing vehicles and his 4-wheelers. Keith was extremely loving and generous, he always had a smile on his face and made everyone laugh. He loved his family and friends deeply.

Keith's family would like to extend our sincere appreciation to the doctors and nurses at St. Vincent Hospital, with special thanks to his nurses Katie and Lindsey and APNP Candice who showed him and his family so much respect and love. Keith was an organ donor and we are so proud of him for giving of himself so others could live--this was the type of person Keith was.

There will be no immediate service but there will be a Celebration of Life this summer to gather, remember and celebrate the great person Keith was. Rest in peace sweet boy, we will be okay knowing you are now with your Mom and Dad again. You will be missed every day by so many.