William Ervin Kinnamon (May 13, 1919 – April 16, 2011) was an American umpire in Major League Baseball who worked in the American League from 1960 to 1969. Kinnamon officiated in the 1968 World Series, and in the All-Star Game in 1962 (second game) and 1968. He went on to become an umpiring instructor, and he operated one of the two principal umpiring schools for several years.