Delaware Route 11 (DE 11) is a state highway in Kent County, Delaware. It runs from Maryland Route 302 (MD 302) at the Maryland border near Templeville, Maryland northeast to DE 300 near Kenton. The road, known as Arthursville Road for its entire length, passes through the farmland of western Kent County and then through the town of Hartly, where it intersects DE 44. The route was built as a state highway by 1931 and received the DE 11 designation by 1936.

DE 11 begins at the Maryland border in western Kent County, where the road continues west into Maryland as MD 302 towards Templeville. From the state line, DE 11 heads northeast on two-lane, undivided Arthursville Road through a mix of woods and farms, with occasional residences. The road enters the town of Hartly, where it passes Hartly Elementary School and several homes. In the center of Hartly, the route crosses DE 44, then heads north before it curves northeast and leaves Hartly. DE 11 continues into rural areas, making another turn north and passes a few homes. The road runs northeast through more woodland and farm fields and comes to an end at DE 300 to the southwest of Kenton.

DE 11 has an annual average daily traffic count ranging from a high of 2,413 vehicles at the eastern terminus at DE 300 to a low of 1,443 vehicles at the south end of Hartly. None of DE 11 is part of the National Highway System.

By 1920 what is now DE 11 existed as an unimproved county road. The road was taken over by the state and paved by 1931. When Delaware created its state highway system by 1936, DE 11 was assigned to its current alignment. The route has not changed since its inception.

The entire route is in Kent County.