St. Bernard Parish is a parish located in the U.S. state of Louisiana. The parish seat and largest community is Chalmette. The parish was formed in 1807. St. Bernard Parish is part of the New Orleans–Metairie metropolitan statistical area. The parish is located southeast of New Orleans and comprises the Chandeleur Islands and Chandeleur Sound in the east.
St. Bernard was the fastest growing parish in Louisiana from 2010 to 2020, increasing from a population of 35,897 in the 2010 census to 43,764 in 2020. It remains at less than two-thirds of its 2000 population of 67,229, prior to Hurricane Katrina.