John Ashby may refer to:
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John Ashby (Royal Navy officer)
Admiral (Royal Navy), Admiral Sir John Ashby (1646 – 12 June 1693) was an officer of the Royal Navy, who rose to the rank of Admiral (Royal Navy), Admiral. Ashby was the fourth son of Robert Ashby and his wife Alice, who was a sister of Sir Tho ...
(1646–1693), admiral
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John Ashby (militiaman), colonel in the Virginia Militia
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John F. Ashby (1929–2001), bishop of the Episcopal Diocese of Western Kansas
{{hndis, Ashby, John