'John Nash' may refer to:
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John Forbes Nash (born 1928), American mathematician, Nobel laureate, subject of the book and film titled ''A Beautiful Mind''
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John Francis Nash (1908-2004), American railroad executive
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John Nash (architect) (1752-1835), English architect
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John Henry Nash (1871-1947), American printer and bibliophile
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John Nash (artist) (1893–1977), English painter and engraver
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John Nash (cricket administrator) (1906–1977), Secretary of Yorkshire County Cricket Club (1931-1971)
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John Nash (NBA), an executive for several teams in the National Basketball Association, most recently General Manager of the Portland Trail Blazers
★ John Nash, a guitarist in
Electric Six
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John J Nash, (d. 1989), Irish Politician