Nicolas-Gaspard Boisseau (October 10, 1765 – March 9, 1842) was a notary and political figure in Lower Canada.
He was born at Saint-Pierre, Île d'Orléans in 1765, the son of Nicolas-Gaspard Boisseau and the grandson of court clerk and royal notary Nicolas Boisseau, and studied at the Petit Séminaire de Québec.
In the same year, he married Catherine, the daughter of seigneur Ignace-Philippe Aubert de Gaspé.
After his term in office, he resumed his practice as a notary at Saint-Vallier and then in the parish of Saint-Thomas at Montmagny.
His daughter Catherine married Jean-Charles Létourneau, who later became a member of the legislative assembly.