John Sinnott (1829–1896) was an Irish recipient of the Victoria Cross.

John Sinnott may also refer to:

• John Sinnott (American football) (born 1958)
• John Sinnott (politician) (1905–1960), Canadian MP
• John Sinnott SJ (active 1948), rector of Beaumont College, Berkshire, England
• John T. Sinnott (born 1948), American physician, scientist, and business executive

See also[edit]

• John Sinnott Elementary School, Milpitas, California
• John Synnott (1895-?), Irish Gaelic footballer