Legault is a surname. Notable people with the surname include:
Carl Legault (1923–83), Canadian politician
Claude Legault (born 1963), Canadian actor
Diane Legault (born 1956), Canadian politician
François Legault (born 1957), Canadian politician
Hugues Legault (born 1974), Canadian freestyle swimmer
Josée Legault (born 1966), Canadian journalist
Karine Legault (born 1978), Canadian freestyle swimmer
Kyle Legault (born 1985), Canadian speedway rider
Lance LeGault (1937–2012), American actor
Léonard Legault (born 1935), Canadian diplomat
Paul Legault (born 1985), Canadian-American poet
Théodore Legault (1886–1935), Canadian politician
Thierry Legault (born 1962), French astrophotographer
