Dennis C. Baum, 75 of Algonquin was born June 5, 1945 in Chicago to Charles and Stella (Pocius) Baum and passed away peacefully surrounded by his family on November 3, 2020. Dennis was the beloved husband of Marybeth J. (Reder) Baum; loving father of Jennifer (Brad) Baker, Caryn (Daniel) Henry and Andrew (Megan) Baum; cherished grandfather of Rian and Jack Baker, Aidan and Emerson Henry and Sadie, Cassidy, Liam and Quinn Baum; dear brother of Diane (John) Spring and the late Loretta (late Jes) Alvarado, Joan (late Joseph) Curtin and Judy (Charles) Herman and fond uncle of many nieces and nephews. Dennis was also a proud veteran of the United States Marine Corps. and an accountant by trade for most of his life. More than anything, he was a loving husband, father and grandfather who always put his family first. Memorial visitation will be Friday, November 13, 2020 from 11:00 AM until the time of the Memorial Mass at 12 noon at St. Margaret Mary Church, 111 S. Hubbard Street, Algonquin, IL. Entombment will follow at St. Michael the Archangel Cemetery in Palatine.