Cornish is a surname. Notable people with the surname include:
Abbie Cornish (born 1982), Australian actress
Audie Cornish (born 1979), American journalist
Cyril Cornish (1891–1961), Australian politician
D. M. Cornish (born 1972), Australian fantasy author
Francis Evans Cornish (1831–1878), Canadian politician
Fred Cornish (1876–1940), Wales international rugby player
Harry Cornish (1871–1918), English cricketer
Jessie J (born 1988) (real name Jessica Cornish), English R&B and Soul recording artist
Joe Cornish (filmmaker) (born 1968), British television personality
Joe Cornish (photographer) (born 1958), British landscape photographer
Jon Cornish (born 1984), Non-Import Canadian Football League player
Mitch Cornish (born 1993), Australian rugby league player
Richard Cornish (shipmaster) (died 1625), shipmaster accused of forcible sodomy
Robert E. Cornish (1903–1963), controversial American researcher
Samuel Cornish (1795–1858), African-American Presbyterian minister
Sandy Cornish (1793-1869), civic leader in Key West, Florida; former slave
William Cornish (disambiguation)
