Athletics
- Bill Miller (American football) (born 1940), wide receiver in the American Football League
- Bill Miller (athlete) (born 1930), Olympian athlete in the javelin throw
- Bill Miller (coach) (1931–2006), Texas State football coach
- Bill Miller (ice hockey) (1908–1986), Canadian professional hockey player
- Bill Miller (footballer born 1890), English footballer for Brighton & Hove Albion
- Bill Miller (footballer born 1908) (1908–1974), English footballer for Luton Town and Southport
- 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
- Bill Miller (pole vault) (1912–2008), American Olympic pole vaulter
- Bill Miller (umpire) (born 1967), Major League Baseball umpire
- Bill Miller (wrestler) (1927–1997), American professional wrestler
- Billy Miller (born 1977), American professional football player
- Billy Miller (water polo) (born 1988), Australian water polo player
- Will Miller (born 1984), American Olympic rower
- William Miller (Australian athlete) (1846–1939), champion in boxing, fencing, wrestling and weight-lifting
- William Miller (Canadian football) (born 1957), running back in the Canadian Football League
- William Miller (rower) (born 1905), American Olympic rower
- Willie Miller (American football) (born 1947), American football player
- Willie Miller (born 1955), player, manager and director for Aberdeen F.C., player for Scotland national football team
- Willie Miller (footballer born 1910), Scottish footballer for Burnley
- Willie Miller (footballer born 1924) (1924–2005), player for Celtic F.C. and Scotland national football team
- Willie Miller (footballer born 1969), player for Hibernian F.C.
- Willie Miller (basketball) (born 1977), professional basketball player of the Alaska Aces
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