DeSoto Parish is a parish located in the U.S. state of Louisiana. The parish was formed in 1843. At the 2020 U.S. census, the population was 26,812. Its parish seat is Mansfield. DeSoto Parish is part of the Shreveport–Bossier City metropolitan statistical area.

Caddo Parish is a parish located in the northwestern corner of the U.S. state of Louisiana. According to the 2020 U.S. census, the parish had a population of 237,848. The parish seat is Shreveport, which developed along the Red River.