Neil or Neal Williams may refer to:

• Neil Williams (artist) (1934–1988), American painter
• Neil Williams (cricketer) (1962–2006), British cricketer
• Neil Williams (pilot) (1934–1977), Welsh aerobatics pilot
• Neil Williams (water polo) (1918–1998), New Zealand water polo player
• Neal Williams (ecologist), American pollination ecologist
• Neal H. Williams (1870–1956), American physicist
• Neil 'Roberto' Williams (born 1978), British radio presenter
• Neil Wynn Williams (1864–1940), British novelist and writer