Geo quick facts: Chackbay is a census-designated place in northern Lafourche Parish, Louisiana, United States. The population was 5,177 at the 2010 census, up from 4,018 at the 2000 census. It is part of the Houma–Bayou Cane–Thibodaux Metropolitan Statistical Area. Chackbay is a part of the “Ward 6” area of Lafourche Parish – Wikipedia.