Delaware Route 26 (DE 26) is a state highway in Sussex County, Delaware. The route's western terminus is at an intersection with Maryland Route 353 (MD 353) and DE/MD 54 at the Maryland border south of Gumboro and its eastern terminus is at a dead end on the Atlantic Ocean in Bethany Beach, even though signage ends at the DE 1 intersection. The route passes through rural areas of southeastern Sussex County along with the communities of Dagsboro, Millville, Ocean View and Bethany Beach. DE 26 intersects DE 54 in the Gumboro area, U.S. Route 113 (US 113) and DE 20 in Dagsboro, and DE 17 west of Millville. The road was built as a state highway in various stages during the 1920s and 1930s. By 1936, DE 26 was assigned onto its current alignment.

Sussex County is located in the southern part of the U.S. state of Delaware, on the Delmarva Peninsula. As of the 2020 census, the population was 237,378, making it the state's second most populated county only behind New Castle and ahead of Kent. The county seat is Georgetown.