Gérin is a French surname. Notable people with this name include:
Gérin, one of the paladins of Charlemagne's courtAndré Gerin (born 1946), French politicianElzéar Gérin (1843–1887), Canadian politicianFrançois Gérin (1944–2005), Canadian politician and lawyerHenri Gérin (1900–1941), Canadian politicianJohn T. Gerin, American physician at Auburn State Prison in Auburn, New YorkLéon Gérin (1863–1951), Canadian lawyer, civil servant, and sociologistLéon-Denis Gérin (1894–1975), Canadian politicianMaksim Gerin (born 1984), Russian footballerWinifred Gérin (1901–1981), English biographer