Roger Louis Kaffer (August 14, 1927 Joliet, Illinois – May 28, 2009 Joliet) was the American Auxiliary Bishop of the Catholic Diocese of Joliet in Illinois from 1985 until 2002. Kaffer was born on August 14, 1927, to parents, Earl Louis Kaffer and Helen Ruth (nee McManus) Kaffer, in Joliet, Illinois. He was baptized in St. Raymond Parish in Joilet, and also attended the parish's Catholic elementary school. He graduated from Joliet Township High School in 1945. In 1984, Kaffer obtained his doctorate in from St. Mary of the Lake Seminary, now known as the University of Saint Mary of the Lake.