Hart, Ronald E. "Ron”, of O Fallon, Missouri, died on Sunday, May 29, 2011 at the age of 73. Loving husband of Mary Hart NEE: McEwan; beloved son of the late Leonard and Viola Hart; devoted father of Christopher (Sherry), Terry (Tony), Cynthia (Steve) and Sandra; cherished grandfather of 13 and great-grandfather of 3; beloved uncle, cousin, brother-in-law and friend to many. He is preceded in death by his grandson Ryan John Hart and sister Judy Brentlinger. Memorials may be made to American Cancer Society or American Diabetes Foundation.