'''Dorgan''' (''Ó Deargáin'') is an Irish surname, derived from ''dearg'' "red" (compare ''Craoibh Dearg''). Notable people with the surname include:
*Byron Dorgan (born 1942), United States senator from North Dakota *Howard Dorgan (1932–2012), American academic known for his research and writing on religion in Appalachia *Jerry Dorgan (1856–1891), American baseball player *Jim Dorgan (born 1930), Australian rules football player *John L. Dorgan (born 1879), known as Ike Dorgan, American boxing manager, and publicity manager for the Madison Square Garden, founding partner of ''The Ring'' magazine *Joseph "Joe" Dorgan (born 1975), American professional wrestler and personal trainer, best known as Johnny Swinger *Mike Dorgan (1853–1909), American baseball player *Patrick Dorgan, Danish singer *Richard W. Dorgan (1892–1953), American cartoonist *Seán Dorgan (born 1968), Irish politician *Tad Dorgan (1877–1929), American cartoonist *Theo Dorgan (born 1953), Irish poet, writer and lecturer
==See also== *Dorgon (1612–1650), Qing dynasty regent
{{surname|Dorgan}}