Delaware Route 71 is a state highway in New Castle County, Delaware. The route loops off U.S. Route 13 from south of Townsend to Tybouts Corner, traveling to the west of US 13 by way of Townsend, Middletown, and the Summit Bridge. The route overlaps U.S. Route 301 from the north end of Middletown to just north of the Summit Bridge, and also with Delaware Route 896 from Mount Pleasant to just north of the Summit Bridge, where US 301 and DE 896 continue north together to Glasgow.
DE 71 heads north along with US 301 on Summit Bridge Road through farmland. In Mount Pleasant, Delaware Route 896 joins in and the road widens from a two-lane, undivided road to a four-lane, divided road. It heads to the northwest toward Summit, where it intersects the northern terminus of Delaware Route 15. It then heads north over the Chesapeake and Delaware Canal on the Summit Bridge.
Past the Summit Bridge, the road passes under Chesapeake City Road, which heads toward the Maryland border where it becomes Maryland Route 285, which heads west toward the town of Chesapeake City, Maryland. DE 71 then splits from US 301 and DE 896 by heading to the southeast on Red Lion Road. It heads southeast at first and then angles to the northeast, passing by Lums Pond State Park. It heads through suburban development, passing through the community of Kirkwood, and then intersects Delaware Route 72. The route then heads northeast toward Red Lion, where it crosses Delaware Route 7. The final stretch of Delaware Route 71 then heads northeast toward its northern terminus at U.S. Route 13 in Tybouts Corner, within an interchange between US 13 and Delaware Route 1, where DE 1 merges off US 13. Direct access is provided from southbound DE 1 to DE 71 just before the intersection with US 13.