Pierre Guerout (August 31, 1751 – June 23, 1830) was a businessman and political figure in Lower Canada.
He was born Pierre-Guillaume Guerout in the parish of Mille Ville, Rouen, France in 1751, the son of a Huguenot merchant, and came to Quebec City around 1767.
In 1792, Guerout was elected to the 1st Parliament of Lower Canada for Richelieu County.
He was named a commissioner for the improvement of internal communications in 1817; this commission was responsible for maintenance and upkeep of roads and transportation on the Richelieu River between William-Henry (later Sorel) and Chambly.
In 1827, he suffered an attack of apoplexy that left him incapable of managing his affairs and his son took over the operation of the business.