Delaware Route 1A (DE 1A) is a state highway in Sussex County, Delaware. The route runs 2.92 mi (4.70 km) from DE 1 in Dewey Beach to another intersection with DE 1 west of Rehoboth Beach. The route provides access to Rehoboth Beach from DE 1, heading north before turning to the west. DE 1A follows King Charles Avenue, Bayard Avenue, 2nd Street (southbound), Christian Street (northbound), and Rehoboth Avenue.What is now DE 1A was originally a part of DE 14 between 1936 and 1942.