Exelby is a surname. Notable people with the surname include:
Clare Exelby (born 1938), Canadian football player Garnet Exelby (born 1981), Canadian ice hockey player John Exelby (1940/1941–2019), British journalist Leon Exelby (1888–1962), American football player Marion Exelby (born 1951), Australian fencer Murray Exelby (1912–1987), Australian rules footballer Natasha Exelby, Australian journalist Phil Exelby (1905–1981), New Zealand lawn bowls player Randy Exelby (born 1965), Canadian ice hockey player