Prien is an unincorporated community and census-designated place (CDP) in Calcasieu Parish, Louisiana, United States.

Prien is located at 30°10′18″N 93°16′3″W / 30.17167°N 93.26750°W / 30.17167; -93.26750 (30.171700, -93.267384)[3] and consists of unincorporated land on the south side of Lake Charles.

The original community of Prien is located on the southeast shore of Prien Lake, a widening in the Calcasieu River, but the CDP now extends south as far as West Gauthier Road.

[2] The area of the CDP has decreased by 1.3 square miles (3.4 km2) since the 2000 census, due to annexation of certain neighborhoods by the city of Lake Charles.

As of the 2020 United States census, there were 7,745 people, 2,999 households, and 2,284 families residing in the CDP.