Association football •
Bill Miller (footballer, born 1890) (1890–?), English footballer (Brighton & Hove Albion) •
Bill Miller (footballer, born 1908) (1908–1974), English footballer (Luton Town, Southport) •
William Miller (1870s footballer) (died 1894), Scottish footballer (Third Lanark, Scotland national team) •
William Miller (footballer, born 1875) (1875–1915), Scottish footballer •
William Miller (footballer, born 1996), English footballer and former child actor •
Willie Miller (born 1955), Scottish football player, manager and director (Aberdeen, Scotland national team) •
Willie Miller (footballer, born 1895) (1895–1970), Scottish football player (Hibernian) •
Willie Miller (footballer, born 1910) (1910–1978), Scottish football player (Partick Thistle, Burnley) •
Willie Miller (footballer, born 1924) (1924–2005), Scottish goalkeeper (Celtic, Scotland national team) •
Willie Miller (footballer, born 1969), Scottish football player (Hibernian)
Australian rules football •
Bill Miller (Australian footballer) (1936–1986), Australian rules footballer for Geelong •
Billy Miller (Australian footballer) (1884–1970), Australian rules footballer for Geelong •
William Miller (Australian footballer) (1881–1912), South Australian footballer for Norwood
Gridiron football •
Bill Miller (American football coach, born 1931) (1931–2006), American college football head coach at Southwest Texas State University •
Bill Miller (American football coach, born 1956), American college football assistant coach •
Bill Miller (wide receiver) (1940–2024), American football wide receiver in the American Football League •
Billy Miller (American football) (born 1977), American football tight end in the National Football League •
Willie Miller (American football) (born 1947), American football player •
William Miller (Canadian football) (1957–2019), running back in the Canadian Football League
Baseball •
Bill Miller (outfielder) (1879–1957), Major League Baseball player •
Bill Miller (right-handed pitcher) (1910–1982), Major League Baseball player •
Bill Miller (left-handed pitcher) (1927–2003), Major League Baseball player •
William Miller (first baseman) (), National Association baseball player •
Bill Miller (umpire) (born 1967), Major League Baseball umpire
Basketball •
Bill Miller (basketball) (1924–1991), American NBA player and college head coach •
Willie Miller (basketball) (born 1977), professional basketball player for the PBA
Rowing •
Will Miller (rower) (born 1984), American Olympic rower •
William Miller (rower, born 1905) (1905–1985), American Olympic rower •
William Miller (rower, born 1947), American Olympic rower
Track and field •
Bill Miller (javelin thrower) (1930–2016), Olympian athlete in the javelin throw •
Bill Miller (pole vaulter) (1912–2008), American Olympic pole vaulter •
Bill Miller (discus thrower) (1927–1997), American discus thrower, 1949 All-American for the
Ohio State Buckeyes track and field team
Other sports •
Bill Miller (bowls) (1910–2004), American lawn bowler •
Bill Miller (ice hockey) (1908–1986), Canadian hockey player •
Bill Miller (lacrosse) (born c. 1967), American lacrosse player •
Bill Miller (wrestler) (1927–1997), American professional wrestler •
Billy Miller (water polo) (born 1988), Australian water polo player •
Will Miller (rugby union) (born 1993), Australian rugby union player •
William Miller (Australian athlete) (1846–1939), champion in boxing, fencing, wrestling and weight-lifting •
William Miller (cricketer, born 1817), English cricketer •
William Miller (cricketer, born 1905) (1905–1974), Australian cricketer •
William Miller (golfer) (1839–?), Scottish amateur golfer ==Writing and publishing==