Concord Point Light Station was built in 1827 of Port Deposit granite by local contractor John Donahoo, who built thirteen of the earliest lighthouses on the Chesapeake Bay. It was originally lit with nine whale oil lamps, and a Fresnel lens was installed in 1854. The first keeper, John O’Neill, was a hero in the defense of Havre de Grace in the War of 1812. Four generations of the O’Neill family maintained the light until automation in 1920. It was decommissioned in 1975 as the oldest Chesapeake light in continuous service.