Red River Parish is a parish located in the U.S. state of Louisiana. Its seat is Coushatta. In 2000, the population of the parish was 9,622. Self-confessed killer Robert C. Browne (born 1953) grew up in and around Coushatta and the Fairview-Alpha community in northern Natchitoches Parish. In 2006, he confessed to 48 murders, four of which allegedly happened in Red River and Natchitoches parishes. The revelations stunned the Red River community.

As of the census of 2000, there were 9,622 people, 3,414 households, and 2,526 families residing in the parish. The population density was 10/km² (25/mi²). There were 3,988 housing units at an average density of 4/km² (10/mi²). The racial makeup of the parish was 57.87% White, 40.91% Black or African American, 0.28% Native American, 0.09% Asian, 0.02% Pacific Islander, 0.22% from other races, and 0.61% from two or more races. 1.01% of the population were Hispanic or Latino of any race. The parish has a total area of 1,041 km² (402 mi²). 1,008 km² (389 mi²) of it is land and 33 km² (13 mi²) of it (3.18%) is water.