Paincourtville is a census-designated place (CDP) in Assumption Parish, Louisiana, United States.

[4] The first permanent settlements in this region were made by the French and Spanish (including Isleños), circa the mid-18th century along Bayou Lafourche, between the present towns of Donaldsonville and Napoleonville.

From 1755 to 1764, the population was increased by the immigration of the exiled Acadians who emigrated to the area, clearing the land and building homes.

[6] According to the United States Census Bureau, the CDP has a total area of 1.7 square miles (4.5 km2), all land.

The racial makeup of the CDP was 55.43% White, 43.33% African American, 0.45% Asian, and 0.79% from two or more races.

21.1% of all households were made up of individuals, and 12.3% had someone living alone who was 65 years of age or older.