John Wallis (1616–1703) was an English mathematician.
John Wallis may also refer to:
John Wallis (antiquary) (1714–1793), English cleric and county historian John Wallis (Canadian politician) (fl. 1815–1872), Canadian politician John Wallis (Arabic scholar) (c. 1674–1738), Laudian Professor of Arabic at the University of Oxford John Wallis (publisher) (died 1818), publisher of board games John Wallis (MP for King's Lynn) (c. 1567–1633), English merchant and politician John Braithwaite Wallis (1877–1961), Canadian entomologist J. E. P. Wallis (1861–1946), Anglo-Indian judge
See also Jon Wallis (born 1986), English footballer John Wallace (disambiguation) John Wallis Titt (1841–1910), mechanical engineer and builder of a particular design of large wind engine