West Carroll Parish is a parish located in the northeastern part of the U.S. state of Louisiana. As of the 2020 census, the population was 9,751. The parish seat is Oak Grove. The parish was founded in 1877, when Carroll Parish was divided. The area of cotton culture in Louisiana in parishes along this part of the Mississippi River was also referred to as the Natchez District. It included the parishes of East Carroll, Concordia, Madison and Tensas.