Charles Gérin-Lajoie (December 28, 1824 – November 6, 1895) was a Quebec businessman and political figure.

He represented Saint-Maurice in the House of Commons of Canada as a Liberal member from 1874 to 1878.

In 1863, Gérin-Lajoie was elected to the Legislative Assembly of the Province of Canada for Saint-Maurice as a member of the Parti rouge.

He opposed Confederation, but was elected to the federal parliament in 1874 running as a Liberal.

In 1878, he was named superintendent of Public Works for Saint-Maurice and he served in that function until his death at Trois-Rivières on 6 November 1895.