Coleby is a surname. Notable people with the surname include:
A. E. Coleby (1876–1930), British film director, actor and screenwriter Anja Coleby (born 1971), Australian model, television actress, reporter and producer Conrad Coleby (born 1979), Australian actor and photographer Egbert Coleby Morland (1874–1955), English physician and medical editor JoBeth Coleby-Davis (born 1984), Bahamian Progressive Liberal Party politician and attorney Kadeem Coleby (born 1989), Bahamian basketball player Robert Coleby (born 1947), Australian actor Simon Coleby (born 1967), British comic book artist
See also Coleby, North Kesteven, near Lincoln Coleby, North Lincolnshire, near Scunthorpe Coleby Lombardo (born 1978), former child actor RAF Coleby Grange, air force base