DeRidder is a city located in the state of Louisiana, United States. It serves as the parish seat of Beauregard Parish, though a small portion of the city's territory extends into Vernon Parish.
As of the 2020 census, DeRidder had a population of 9,852 residents. The city is identified as the smaller principal city within the DeRidder-Fort Polk South Combined Statistical Area, which encompasses both the Fort Polk South and DeRidder micropolitan areas.