Delaware Route 8 (DE 8) is a state highway located in Kent County in the U.S. state of Delaware. It runs from Maryland Route 454 (MD 454) at the Maryland border in Marydel east to an intersection with DE 9 north of Little Creek. The route passes through rural areas of western Kent County before heading through Delaware's capital, Dover, on Forrest Avenue and Division Street. East of Dover, the road passes through more rural areas. DE 8 intersects DE 44 in Pearsons Corner, DE 15, U.S. Route 13 Alternate (US 13 Alt.), US 13 in Dover, and DE 1 at a partial interchange east of Dover. The road was built as a state highway west of Dover by 1924 and east of Dover by 1931. The DE 8 designation was given to the road by 1936.

DE 8 begins at the Maryland border in Marydel, where the road continues into Marydel, Maryland as MD 454. From the state line, the route heads southeast on two-lane undivided Halltown Road, passing a few homes and businesses. The road leaves Marydel and curves northeast through a mix of farmland and woodland with some homes. In Pearsons Corner, DE 8 intersects the eastern terminus of DE 44, where the name changes to Forrest Avenue and it turns to the east. The road continues east through agricultural areas with some woods and development. This area of Kent County is home to many Amish families and businesses.

DE 8 crosses into Dover, where it widens from a two-lane country road to a five-lane road with a center left-turn lane. The road runs through residential areas before heading past several businesses in the western part of Dover, intersecting DE 15. The route heads past a few homes before it continues east onto Division Street at the Forest Street intersection, narrowing to a two-lane road. DE 8 passes commercial establishments and crosses Norfolk Southern's Delmarva Secondary railroad line, continuing past a mix of homes and businesses to the north of downtown Dover. The road crosses US 13 Alt. and passes to the south of Wesley College before intersecting State Street. The road runs through wooded areas of homes prior to crossing the St. Jones River and heading between industrial areas to the north and residential neighborhoods to the south.

DE 8 intersects US 13 in a commercial area and the name changes to North Little Creek Road and it continues through the residential eastern part of Dover. The route heads through less dense areas of homes with some farmland and at the eastern edge of Dover, it features a partial interchange with the DE 1 freeway, providing access to and from the north. After this interchange, the road leaves Dover and heads east through open agricultural areas with some homes. DE 8 reaches its eastern terminus at an intersection with DE 9 just north of the town of Little Creek.

DE 8 has an annual average daily traffic count ranging from a high of 19,408 vehicles at the intersection with Forest Street to a low of 894 vehicles at the Little Creek border near the eastern terminus. The portion of DE 8 between DE 44 and DE 15 is part of the National Highway System.

By 1920, what is now DE 8 existed as an unimproved county road. The route was completed as a state highway between the Maryland border in Marydel and Dover by 1924. By 1925, the road was proposed as a state highway between Dover and Little Creek. This state highway was completed by 1931. When Delaware created its state highway system by 1936, DE 8 was assigned to its current alignment between the Maryland border in Marydel and DE 9 north of Little Creek. By 2003, a partial interchange was built with the DE 1 freeway.

The entire route is in Kent County.