St. John the Baptist Parish is a parish located in the U.S. state of Louisiana. At the 2020 census, the population was 42,477. The parish seat is Edgard, an unincorporated area, and the largest city is LaPlace, which is also unincorporated.

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 and 1,948 in 2020. It is part of the New Orleans–Metairie–Kenner Metropolitan Statistical Area. Edgard is part of the German Coast of Louisiana.