Cleveland County is a county located in the U.S. state of Arkansas. Its population was 7,550 at the 2020 U.S. census. The county seat and largest city is Rison.

Rison, officially the City of Rison, is a city in and the county seat of Cleveland County, Arkansas, United States. Its population was 1,344 at the 2010 U.S. census. It is included in the Pine Bluff, Arkansas Metropolitan Statistical Area. Rison is a bedroom community for people who work in Pine Bluff. The largest employers are the city and county governments, the Cleveland County School District, the Cleveland County Nursing Home. There are two banks, eight churches, and about forty-five businesses within the city limits. Among the local properties listed on the National Register of Historic Places are the Rison Cities Service Station and the Rison Texaco Service Station.