Edgard is a census-designated place (CDP) in, and the parish seat of, St. John the Baptist Parish, Louisiana, United States. The population was 2,637 at the 2000 census. It is part of the New Orleans–Metairie–Kenner Metropolitan Statistical Area. Edgard is part of the German Coast of Louisiana.
One of the parish's first communities and a social haunt of the privateer Jean Lafitte, Edgard has been the parish seat since 1848. Originally named St. John the Baptist for the Catholic church at its heart, Edgard was renamed in 1850 for its postmaster, Edgar Perret. Edgard's first St. John the Baptist Catholic Church (1772) was destroyed by the Poché Crévasse in 1821.