Winsor is a surname. Notable people with the surname include:

• Charles P. Winsor (1895-1951), engineer-turned-physiologist-turned-biostatistician
• Frederick Albert Winsor, gaslight pioneer
• Justin Winsor, American writer and historian
• Jacqueline Winsor, American sculptor
• Kathleen Winsor, romance novelist
• Mulford Winsor (1874 – 1956), American newspaperman
• Tom Winsor, British lawyer and economic regulator

• William Embriaco
• William E. McAnulty Jr.
• William Emerson
• William Emerson Barrett
• William Emerson "Bill" Brock
• William Emerson "Bill" Brock III
• William Emerson Brock I
• William Emerson Brock III
• William emerson (mathematician)
• William Emerson Ritter
• William Emerson Sr.
• William Emery Merrill
• William Emes
• William E. Metzger
• William E. Minshall
• William E. Minshall Jr.
• William E. Minshall, Jr.
• William E.M. Lands
• William E. M'Lellan
• William Emmet Simms
• William Emmett Ryan III
• William Emmett Simms
• William E. Moerner
• William E. Morris
• William E. Morris (politician)