•
William Collins (cricketer, born 1837) (1837–1876), Australian cricketer •
William Collins (cricketer, born 1848) (1848–1932), Welsh author and cricketer •
William Collins (cricketer, born 1868) (1868–1942), English cricketer •
William Collins (tennis), British tennis player from the 1920s and 30s, see
1930 Wimbledon Championships – Men's singles •
William Collins (canoeist) (1932–1993), Canadian canoer who competed in the 1956 Summer Olympics •
Bill Collins (sprinter) (William Collins, born 1950), American sprinter •
Bill Collins (American football) (William Newton Collins, 1894–?), American college football player and coach •
Bill Collins (catcher) (William J. Collins, 1863–1893), Irish-American baseball player •
Bill Collins (footballer, born 1871) (William Collins, 1871–1942), Australian footballer for Carlton •
Bill Collins (footballer, born 1920) (William Hanna Collins, 1920–2010), aka Buster Collins, Northern Irish footballer •
Bill Collins (golfer) (William R. Collins, 1928–2006), American professional golfer •
Bill Collins (ice hockey) (William Earl Collins, born 1943), Canadian former ice hockey player •
Bill Collins (outfielder) (William Shirley Collins, 1882–1961), American baseball player •
Bill Collins (racecaller) (William Henry Collins, 1928–1997), Australian racecaller •
Bill Collins (rugby union) (William Reuben Collins, 1911–1993), New Zealand rugby union player •
Bill Collins (television presenter) (William Roderick Collins, 1934–2019), Australian film critic and television presenter •
Billy Collins Jr. (1961–1984), American professional boxer •
Billy Collins (Australian footballer) (William Henry Collins, 1909–1982), Australian rules footballer ==Others==