William Kay
William Kay may refer to:
Politicians
- William Kay (politician) businessman and politician in South Australia
- William A. Kay, American politician
- William Frederic Kay, Canadian politician
Sports
- William Kay (cricketer), Australian cricketer
- Will Kay, rugby player
- Bill Kay (baseball), outfielder in Major League Baseball
- Bill Kay (defensive back), former American football player, a defensive back for the Houston Oilers.
- Bill Kay (tackle), American football player, a tackle for the New York Giants.
- Billy Kay (wrestler), Australian professional wrestler
Baronets
- Sir William Kay, 2nd Baronet of the Kay baronets
- Sir William Algernon Kay, 5th Baronet of the Kay baronets
- Sir William Algernon Ireland Kay, 6th Baronet CMG DSO of the Kay baronets
Others
- William Kay (journalist), British financial and business journalist
- William Kay (priest), Anglican Provost of Blackburn
- William Kay (scholar), English cleric and academic
- Billie Kay, Australian professional wrestler
- Billy Kay (actor), American film and television actor
- Billy Kay (writer), writer, broadcaster and language activist
- William Kay, namesake of Kaysville, Utah