Gouin or Goüin is a French surname. Notable people with the surname include:
Alexandre Goüin (1792–1872), French banker and politician
Antoine-Némèse Gouin (1821–1899), lawyer and politician
Ernest Goüin (1815–1885), French engineer
Eugène Goüin (1818–1909, French banker and politician
Félix Gouin (1884–1977), French politician
Jacques Gouin de Beauchêne (1652–1730), French explorer
Jean Ivan Gouin (1916–2007), Canadian businessman
Léon Mercier Gouin (1891–1983), Quebec lawyer and politician
Louis Gouin (1756–1814), Canadian politician
Lomer Gouin (1861–1929), Quebec politician, former Premier
Nicolas Gouïn Dufief (1776–1834), French émigré teacher
Ollivier Mercier Gouin (or Olivier), Quebec writer, reporter, actor
Paul Gouin (1898–1976), Quebec politician
