The word Atchafalaya derives from the Choctaw term hacha falaia, meaning "long river".
Atchafalaya may refer to:
Atchafalaya, Louisiana, Ghost town in Louisiana, U.S. Atchafalaya River, Louisiana, U.S. Atchafalaya Basin or Atchafalaya Swamp, wetlands surrounding the lower part of the Atchafalaya River, Louisiana Atchafalaya Basin Bridge Atchafalaya Swamp Freeway, a portion of Interstate 10 in Louisiana that includes the bridge Atchafalaya National Heritage Area Atchafalaya National Wildlife Refuge Atchafalaya Golf Course at Idlewild, Patterson, Louisiana A song from the album Sylva, by jazz ensemble Snarky Puppy