Concord is an unincorporated community in Sussex County, Delaware, United States.

Concord is located along Delaware Route 20, east of Seaford.

[2] Concord originally had several bog-iron furnaces in the area in the late 18th and early 19th centuries.

[3] The Pine Grove Furnace Site was listed on the National Register of Historic Places in 1978.

This Delaware state location article is a stub.