Crossan is a surname. Notable people with the surname include:
Clarence K. Crossan (1876–1960), American Republican politician Dalton Crossan (born 1994), American football running back Dave Crossan (1940–2019), American football offensive lineman Denis Crossan, British cinematographer Diana Crossan (born 1949), New Zealand civil servant Eddie Crossan (1925–2006), Northern Irish association football player Eion Crossan (born 1967), New Zealand rugby union player Ernie Crossan (1915–2009), Australian cricketer Errol Crossan (1930–2016), Canadian association football player Gary Crossan (born 1971), Irish long-distance runner Jim Crossan (21st century), Northern Irish association football player and manager Jim Crossan (Australian footballer) (1902–1979), Australian rules footballer Johnny Crossan (born 1938), Northern Irish author, radio sports analyst, entrepreneur and association football player John Dominic Crossan (born 1934), Irish-American religious scholar Keith Crossan (born 1959), Northern Irish rugby union player Mark Crossan, Irish Gaelic footballer Mura Masa (born 1996), British electronic music producer, real name Alex Crossan Paddy Crossan (1894–1933), Scottish association football player PJ Crossan (born 1998, Scottish association football player Rick O'Shea (born 1973), Irish radio personality, real name Paul Crossan Rob Crossan (born 1968), Canadian alpine skier Sarah Crossan (21st century), Irish author