Red River Parish is a parish located in the U.S. state of Louisiana. As of the 2020 census, the population was 7,620, making it the fourth-least populous parish in Louisiana. The parish seat and most populous municipality is Coushatta. It is one of the newer parishes, created in 1871 by the state legislature from parts of Bienville, Bossier, Caddo, Desoto and Natchitoches Parishes under Reconstruction. The plantation economy was based on cotton cultivation, highly dependent on enslaved African labor before the American Civil War.

Coushatta is a town in, and the parish seat of, rural Red River Parish in north Louisiana, United States. It is situated on the east bank of the Red River. The community is approximately 45 miles south of Shreveport on U.S. Highway 71. The population, 2,299 at the 2000 census, is nearly two-thirds African American, most with long family histories in the area. The 2010 census, however, reported 1,964 residents, a decline of 335 persons, or nearly 15 percent during the course of the preceding decade. In 2020, its population was 1,752. The city is named after the Coushatta, a Native American nation indigenous to the region.