Maltby is an English surname. Notable people with the surname include:
Alfred Maltby (c.1842–1901), English actor and playwright Arnold Maltby (1913–2003), Australian rules footballer Brough Maltby (1826–1894), English archdeacon Christopher Maltby (1891–1980), British army officer David Maltby (1920–1943), British bomber pilot Edward Maltby (1770–1859), English bishop Edward Maltby (British civil servant) (1811–1889), British colonial administrator George Maltby (1876–1924), English cricketer Henry Maltby (c.1818–1869), English cricketer H. F. Maltby (1880–1963), British actor and writer Jackie Maltby (born 1939), English footballer Jake Maltby (born 2000), English footballer Jasper A. Maltby (1826–1867), American army general John Maltby (1936–2020), British painter and ceramics maker Judith Maltby (born 1957), American priest and church historian Kirk Maltby (born 1972), Canadian ice hockey player Lauren Maltby (born 1984), American actress and psychologist Lorraine Maltby (born 1960), British biologist Lucy M. Maltby (1900–1984), American home economics educator Margaret Eliza Maltby (1860–1944), American physicist Matilda Cooke Maltby (1841–1912), American librarian Norman Maltby (born 1951), English cricketer Paul Maltby (1892–1971), British Royal Air Force officer Peg Maltby (1899–1984), English-born Australian book illustrator and children's writer Per Maltby (1933–2006), Norwegian astronomer Richard Maltby, Sr. (1914–1991), American musician and bandleader Richard Maltby, Jr. (born 1937), American theatre director and lyricist Sarah Maltby, Manx politician Thomas Maltby (1890–1976), Australian politician William Maltby (1763–1854), English solicitor, librarian and bibliographer