Prospect Harbor Lighthouse sits on land that is part of a U.S. Naval Communications Center and is not open to the public except for special events. Currently, the lighthouse is being leased to the American Lighthouse Foundation.

Specifications:
The station was established in 1850. The current lighthouse was built in 1891 and became fully automated in 1951. The tower is constructed of wood and is 38 feet with a focal plane height of 42 feet. The keeper's house was built in 1891, followed by the oil house and boathouse that were built in 1905.

Original Optic: Fifth Order Fresnel Lens
Current Optic: 250 mm