Sportspeople
- Bill Stewart (American football) (1952–2012), American football coach
- Bill Stewart (baseball) (born 1928), American outfielder who played for the Kansas City Athletics
- Bill Stewart (ice hockey) (born 1957), Canadian ice hockey defenceman
- Bill Stewart (sports official) (1894–1964), American baseball coach and ice hockey referee
- Billy Stewart (footballer) (born 1965), English goalkeeper who played for several clubs, including Chester and Southport
- Willie Stewart (1872–1945), Scottish footballer who played for Newton Heath and Luton Town
- William Stewart (footballer born 1867), Scottish footballer who played for Preston North End and Everton in the 1890s
- William Stewart (footballer born 1876), Scottish international footballer who played for Queen's Park and Newcastle United
- William Stewart (footballer born 1910), Scottish footballer who played for Manchester United and Motherwell
- William Stewart (cricketer, born 1847) (1847–1883), English cricketer
- William Stewart (athlete), United States national champion high jumper
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