AR 231 begins at U.S. Route 412 east of Walnut Ridge and runs north to meet AR 34. The route concurs with AR 34 diagonally northeast until O'Kean, when it begins to follow AR 90 west. AR 231 then arrows off AR 90 north to the community of Sharum, where it terminates at AR 304.
Arkansas Highway 231 is the name a state highway of 6.1 miles (9.8 km) that runs in Randolph County. It is a brief connector of AR 93 to AR 251. The route passes through the unincorporated community of Hamil.