Born in
Racine, Wisconsin, he was the eldest of six children born to Albert and Justine (née Breland) Dandeneau, both
French Canadian immigrants. Dandeneau graduated from
St. Catherine's High School in Racine, Wisconsin. He served in the
United States Army from 1951 to 1955. Dandeneau then received his bachelor's and master's degree from
Dominican College of Racine and worked as a full-time teacher from 1960 through 1989, first at Sturtevant Grade School, then at Mitchell Junior High, where he taught English, History, and Science. He continued to work as a substitute teacher after his retirement in 1989. He served on the board of supervisors for the town of
Caledonia, Wisconsin from 1971 through 1977. From 1975 to 1979, Dandeneau served in the
Wisconsin State Assembly. He then served as chief clerk of the Wisconsin Assembly from 1979 to 1981. In 1975, Dandeneau was charged with misconduct in office, a felony, and violating state campaign laws in connection with unreported campaign contributions and vested interest in granting a liquor license. He was charged in 1976 with felony misconduct in public office. Case dismissed. Dandeneau was re-elected to the Caledonia board of supervisors in 1990 and was chairman of the town board from 1992 to 1995. For the last 27 years of his life, Dandeneau held a monthly breakfast meeting for Racine politicians and businessmen to discuss the issues of the day. Dandeneau died from cancer at his home in Caledonia, Wisconsin. ==Electoral history==