Hagan is a surname. Notable people with the surname include:
Art Hagan (1863-1936), American baseball player
Billy Hagan (1932-2007), American NASCAR driver/owner
Bo Hagan (1925-2002), American football and baseball player
Bob Hagan, American politician
Bob Hagan (rugby league), Australian rugby league player and coach
Cliff Hagan, American basketball player
Darian Hagan, American football player
Derek Hagan, American football player
Ebenezer Hagan, Ghanaian football (soccer) player
Edward P. Hagan (1846–1893), New York politician
George Hagan (politician), Ghanaian academic and politician
George Elliott Hagan (1916-1990), American politician
Glenn Hagan, American basketball player
Helene Hagan, American anthropologist
Jean Hagen (1923–1977), American actress
Jim Hagan, Northern Irish footballer and manager
Jimmy Hagan (1918-1998), English footballer and manager
John N. Hagan (1873-1952), American politician
John Raphael Hagan, American Catholic bishop
Kay Hagan, American politician
Kevin Hagan, New Zealand football player
Lyn Hagan, British writer and artist
Michael Hagan, Australian rugby league player and coach
Molly Hagan, American actress
Robert Hagan (1921-1999), American politician
Sarah Hagan, American actress
Thomas Hagan, assassin of Malcolm X
Tim Hagan, American politician
Uta Hagen (1919–2004), German American actress
