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