Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.2%) is water. It is the second-largest county in Tennessee by area. The county lies primarily along the southwestern Highland Rim. The Tennessee River flows along Wayne County's northwestern border with Decatur County. The Buffalo River, a tributary of the Duck River, flows through the northern part of Wayne County. The Green River, a tributary of the Buffalo, flows through Waynesboro.
Geography According to the U.S Census Bureau, the county has a total area of , of which is land and (0.2%) is water. It is the second-largest county in Tennessee by area. The county lies primarily along the southwestern Highland Rim. The Tennessee River flows along Wayne County's northwestern border with Decatur County. The Buffalo River, a tributary of the Duck River flows through the northern part of Wayne County. The Green River, a tributary of the Buffalo, flows through Waynesboro.