Mississippi Highway 145 (MS 145) is the designation for the parts of the old U.S. Route 45 (US 45) roadbed that the state continues to maintain or has designated. Those ten sections travel through Waynesboro, near , through Shubuta, from De Soto to Meridian, through Shuqualak, through Macon, through Aberdeen, through Nettleton, from Shannon to Booneville, and through Corinth.