Bayou Vista is a census-designated place (CDP) in St. Mary Parish, Louisiana, United States. As of the 2020 census, Bayou Vista had a population of 4,213. It is part of the Morgan City Micropolitan Statistical Area.
Bayou Vista is located at (29.690521, -91.269048).
According to the United States Census Bureau, the CDP has a total area of , of which is land and , or 7.52%, is water.
Bayou Vista irst appeared as an unincorporated place in the 1970 U.S. census; and then as a census designated place the 1980 U.S. Census.
As of the 2020 United States census, there were 4,213 people, 1,859 households, and 1,030 families residing in the CDP.