Colleen Ryan Killin, 77, of Chesterfield, passed away peacefully after a long illness on October 13, 2022. She entered into this world on December 9, 1944, in Peoria, Illinois. Colleen is formerly of Miami, Florida and Tucson, Arizona. She was preceded in death by her mother, Mary Catherine Ryan. She is survived by her three loving children, Marianne Killin, Lawrence Killin, Jr., and Kevin Killin (Rachel); and three grandchildren, Katie Killin-Cheney, Connor Killin, and Faith Killin; and a host of nieces and nephews. She loved being surrounded by her family, her cats, and going to KOS band concerts. She will be greatly missed by all who knew and loved her. A celebration of life will be held in upcoming days.