Morahan is a surname. Notable people with the surname include:
Andy Morahan (born 1958), English commercial, film and music video director
Caroline Morahan (born 1977), Irish actress and television host
Christopher Morahan (born 1929), English stage and television director and producing manager
Edythe Morahan de Lauzon, Canadian poet
Hattie Morahan (born 1978), English television, film and stage actress
Jim Morahan (1902–1976), British art director
Luke Morahan (born 1990), Australian Rugby Union Player
Thomas Morahan (1931–2010), member of the New York State Senate
Thomas N. Morahan (1906-1969), British film designer