Frankford is a town in Sussex County, Delaware, United States. The population was 847 at the 2010 census, an increase of 18.6% over the previous decade. It is part of the Salisbury, Maryland-Delaware Metropolitan Statistical Area.

The Delmarva Central Railroad is an American short-line railroad owned by Carload Express that operates 188 miles (303 km) of track on the Delmarva Peninsula in the states of Delaware, Maryland, and Virginia. The railroad operates lines from Porter, Delaware to Hallwood, Virginia and from Harrington, Delaware to Frankford, Delaware along with several smaller branches. The DCR interchanges with the Norfolk Southern Railway and the Maryland and Delaware Railroad. The railroad was created in 2016 to take over the Norfolk Southern Railway lines on the Delmarva Peninsula. The DCR expanded by taking over part of the Bay Coast Railroad in 2018 and the Delaware Coast Line Railroad in 2019.