Greetings... and welcome to Sebastian County Online. Located in the Arkansas River Valley, Sebastian County is a rich land with rolling farmlands, forested ridges, isolated mountains and lakes. With 529 square miles, we are the smallest County in the State. We are proud to offer our residents some of the best services in the nation. Whether a long-time resident, a newcomer, or just visiting, we hope you find this site useful in learning about Sebastian County, Arkansas and accessing its services. We will continually be working to provide more online services through our website and hope you'll check back with us often.