Acadia Parish is a parish located in the U.S. state of Louisiana. At the 2020 U.S. census, the population was 57,576. The parish seat is Crowley. The parish was founded from parts of St. Landry Parish in 1886, and later an election was held to determine the parish seat, ending when Crowley beat Rayne and Prairie Hayes. Acadia Parish is included in the Lafayette metropolitan statistical area.

St. Landry Parish is a parish located in the U.S. state of Louisiana. As of the 2020 Census, the population was 82,540. The parish seat is Opelousas. The parish was established in 1807.