Garyville is a census-designated place (CDP) in St. John the Baptist Parish, Louisiana, United States.

As of the 2020 United States census, there were 2,123 people, 822 households, and 504 families residing in the CDP.

17.9% of all households were made up of individuals, and 8.4% had someone living alone who was 65 years of age or older.

A referendum on the incorporation of Garyville was held on July 19, 2008, but failed to pass.

Louisiana Supreme Court-appointed ad hoc judge Anne Lennan Simon ruled on July 15, 2008, that the areas zoned as designated industrial areas included the facilities of Marathon Petroleum Company, Nalco Co., Gramercy Alumina LLC, Cargill Inc., and Evonik-Stockhausen Inc., thus reducing the city's proposed income from "about $144 million to about $28 million.