William George Williams, Jr. (September 19, 1930 – September 22, 1998) was a National League umpire from 1963 through 1987. He wore uniform number 24 for the most of his career.
Born in Brooklyn, New York, Williams started his umpiring career in 1956 in the Evangeline League, before joining the Southwestern League (1957), the South Atlantic League (1958–July 1959) and the International League (July 1959–July 1963).
Williams joined the National League full-time starting in 1963, and officiated in the 1981 National League Division Series, four National League Championship Series' (1972, 1975, 1978, 1982), three World Series (1970, 1976, 1985), and three Major League Baseball All-Star Games (1965, 1973, 1979). He also was the home plate umpire for the 1967 no-hitter hurled by Houston Astros pitcher Don Wilson against the Atlanta Braves.