Norco is a census-designated place (CDP) in St. Charles Parish, Louisiana, United States. The population was 3,579 at the 2000 census. The community is home to a major Shell petroleum refinery. The CDP's name is derived from the New Orleans Refining Company.
By the late 18th century, French and European colonial settlers had established numerous sugar cane plantations. They imported enslaved Africans as laborers. As sugar cane cultivation was highly labor-intensive, the slave population greatly outnumbered the ethnic Europeans in the colony, a circumstance that continued after the Louisiana Purchase by the United States in 1803.
On 8 January 1811, planters were alarmed by the German Coast Uprising led by Charles Deslondes, a free person of color from Haiti (formerly the French colony of Saint-Domingue). It was the largest slave uprising in US history, though it resulted in few white fatalities.