Baylis is a surname. Notable people with the surname include:
Abraham B. Baylis (1811–1882), American businessman Anna Baylis (born 1976), Australian mountain biker Charles A. Baylis (1902–1975), American philosopher Edward Baylis (1791–1861), British mathematician and businessman Evan Baylis (born 1993), American football player Francoise Baylis (born 1961), Canadian bioethicist Frank Baylis (born 1962), Canadian politician Geoff Baylis (1913–2003), New Zealand botanist Gloria Baylis (1929–2017), Barbadian-Canadian civil rights activist Hank Baylis (1923–1980), American baseball player Henry Baylis (1826–1905), Australian police magistrate James Baylis (died 1870), Irish theatre director Jearld Baylis (1962–2024), Canadian football player John R. Baylis (1885–1963), American chemist and engineer Keith Baylis (born 1947), English cricketer Lilian Baylis (1874–1937), British theatrical producer and manager Liz Baylis (born 1963), American sailor Maggie Baylis (1912–1997), American graphic designer Marc Baylis (born 1977), British actor Matthew Baylis (born 1971), British novelist and screenwriter Myrtle Baylis (1920–2014), Australian cricket and netball international Nadine Baylis (1940–2017), British stage and costume designer Thomas Baylis (disambiguation), several people Trevor Baylis (1937–2018), English inventor William Baylis (born 1962), American sailor