John Jacob Astor (1763–1848) was a German-born American businessman and a member of the Astor family

John Astor may also refer to:

• John Jacob Astor III (1822–1890), grandson of the above, American financier and philanthropist
• John Jacob Astor IV (1864–1912), nephew of the above, American businessman who died on the Titanic
• John Jacob Astor, 1st Baron Astor of Hever (John Jacob Astor V) (1886–1971), grandson of the financier, American-born English newspaper proprietor and politician
• John Jacob Astor VI (1912–1992), son of the Titanic passenger, American socialite and shipping businessman
• John Astor (1923-1987), son of the 1st Baron, English politician
• Jakie Astor (Sir John Jacob Astor VII) (1918–2000), nephew of the 1st Baron, English politician and sportsman
• John Astor, 3rd Baron Astor of Hever (John Jacob Astor VIII) (born 1946), grandson of the 1st Baron, English businessman and politician

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