Louis Guillet (January 28, 1788 – October 28, 1868) was a Quebec notary and political figure.
He was born in Sainte-Geneviève-de-Batiscan in 1788, apprenticed as a notary at Pointe-aux-Trembles, and was admitted to the profession in 1809.
Guillet opposed the creation of registry offices in Lower Canada for the preservation of documents related to real estate ownership and, instead, suggested that notaries hold these documents in trust.
He was elected to the Legislative Assembly of the Province of Canada for Champlain in 1844 as a Reformer and was reelected in 1848.
Guillet retired from his practice as notary in 1863 and died in Sainte-Geneviève-de-Batiscan in 1868.