Reserve is a census-designated place (CDP) in St. John the Baptist Parish, Louisiana, United States, on the east bank of the Mississippi River. The population was 9,111 at the 2000 census. It is part of the New Orleans–Metairie–Kenner Metropolitan Statistical Area.
In the early 20th century the plantation at Reserve had the largest sugar refinery in the United States.
President William Howard Taft visited Reserve in 1909. President Gerald Ford visited Reserve in 1976.