Baldwin is a town in St. Mary Parish, Louisiana, United States. The population was 2,436 at the 2010 census, down from 2,497 in 2000. It is part of the Morgan City Micropolitan Statistical Area.
The Louisiana physician and politician Alvan Lafargue practiced in Baldwin, his wife's hometown, prior to 1915.
Baldwin is located at 29°50′10″N 91°32′56″W (29.836039, -91.548799).
According to the United States Census Bureau, the town has a total area of 3.2 square miles (8.3 km2), all land.
As of the census of 2000, there were 2,497 people, 777 households, and 607 families residing in the town. The population density was 2,328.6 people per square mile (901.0/km2). There were 822 housing units at an average density of 766.6 per square mile (296.6/km2). The racial makeup of the town was 32.16% White, 64.52% African American, 1.00% Native American, 0.84% Asian, 0.80% from other races, and 0.68% from two or more races. Hispanic or Latino of any race were 1.48% of the population.