Seaford is situated along U.S. Route 13, the main north-south artery running from Wilmington, DE to Norfolk, VA. Located in the southwest portion of the state, its central position on the Delmarva Peninsula (between the Chesapeake Bay and the Atlantic Ocean) makes it an important trade center and convenient to both the large cities and seashore resorts.

Using a network of first-class highways, Seaford is 83 miles from Baltimore, 96 miles from Washington, D.C., 111 miles from Philadelphia, and 200 miles from New York City.