Tallis is the English variation of the ancient name Thales, most notably Thales of Miletus.
Tallis may refer to the following people: Given name Tallis Obed Moses (born c. 1954), President of Vanuatu
Surname Canon Tallis, a major character in the young adult novels of Madeleine L'Engle Cedric Tallis (1914–1991), American baseball executive Gorden Tallis (born 1973), Australian rugby league player John Tallis (1817–1876), English cartographic publisher Tallis Directory, is a gazetteer of Gravesend written and published by John Nicola Tallis (born 1985), British historian Raymond Tallis (born 1946), English geriatrician and intellectual Sonja Tallis (born 1943), Australian actress, singer and drama teacher Steve Tallis (born 1952), Australian singer-songwriter and guitarist Thomas Tallis (1505–85), English composer The Tallis Scholars, British early music ensemble named after the composer Thomas Tallis School in Greenwich, London, England