Winsor is a surname. Notable people with the surname include:
- Charles P. Winsor (1895–1951), American engineer, physiologist, and biostatistician
- Frederick Albert Winsor, German gaslight pioneer
- Justin Winsor, American writer and historian
- Jack Winsor, Canadian politician
- Jacqueline Winsor, American sculptor
- Kathleen Winsor, American romance novelist
- Mulford Winsor (1874–1956), American newspaperman
- Reginald Winsor (1891–1963), Australian railway administrator
- Tom Winsor, British lawyer and economic regulator
- William Winsor, British painter and co-founder of Winsor & Newton