Amelia is a census-designated place (CDP) in St. Mary Parish, Louisiana, United States.

[2] It is part of the Morgan City Micropolitan Statistical Area.

The first postmaster named the town after Amelia Dupuis, his fiancée, who died shortly before their wedding day.

Morgan City is located 8 miles (13 km) to the west.

[2] As of the 2020 United States census, there were 2,132 people, 904 households, and 522 families residing in the CDP.