New Sarpy is a census-designated place (CDP) in St. Charles Parish, Louisiana, United States.

[2] In 1699, Pierre Le Moyne d'Iberville and Jean-Baptiste Le Moyne de Bienville discovered an indigenous Bayagoula settlement located near the Mississippi River intersection with a tributary in present-day New Sarpy.

[4] In 1722 and 1723, French, German, and newly arrived settlers from French Canada were granted lands on the east bank of the Mississippi River and moved from west bank German Coast villages to establish the first east bank settlement at L’Anse aux Outardes or Bustard’s Cove.

As of the 2020 United States census, there were 1,169 people, 441 households, and 353 families residing in the CDP.

[8] St. Charles Parish Public School System operates public schools, including: The film Bug, directed by William Friedkin, includes scenes shot at Migliore's Grocery and Boomerang's Bar, in New Sarpy.