Six auxiliary routes of Arkansas Highway 7 currently exist. Four are spur routes, one is a business route, and one is a truck route. They are listed below in south-to-north order.

Highway 7 is a north–south state highway that runs across the state of Arkansas. As Arkansas's longest state highway, the route runs 297.27 miles (478.41 km) from Louisiana Highway 558 at the Louisiana state line north to Bull Shoals Lake at Diamond City near the Missouri state line. With the exception of the segment north of Harrison, Highway 7 has been designated as an Arkansas Scenic Byway and a National Forest Scenic Byway. The road passes through the heart of both the Ozark Mountains and the Ouachita Mountains, and features scenic views. It's the route favored by motorcycle riders touring the region.