William Slater

William, Bill, Billy or Willie Slater may refer to:

• William Slater (architect) (1819–1872), English architect
• William Slater (cricketer) (1790–1852), English cricketer
• William Slater (swimmer) (born 1940), Canadian swimmer
• William Slater (Tennessee politician), (born 1961), American politician from Tennessee
• William A. Slater (1857–1919), American businessman, art collector, and philanthropist
• Bill Slater (broadcaster) (1902–1965), American educator, sports announcer, and radio/television personality
• Bill Slater (footballer) (1927–2018), English footballer
• Bill Slater (politician) (1890–1960), Australian lawyer, politician and diplomat
• Billy Slater (born 1983), Australian rugby league footballer
• Billy Slater (footballer) (1858–?), English footballer
• Willie J. Slater, American football coach and player
• Edward Slater (1917–2016), also known as Bill Slater, Australian biochemist