Five Finger Islands Light, Maritime lighthouse in Petersburg Borough, Alaska, United States

Five Finger Islands Light is a white concrete lighthouse tower near Petersburg that rises 68 feet above the water to guide ships through the channels between Stephens Passage and Frederick Sound. The structure features a functional modern design with its lantern room positioned higher to ensure visibility across the surrounding waters.

The United States Lighthouse Service built this navigational structure in 1902 to guide ships through the local waters. After a fire destroyed the original building in 1933, it was replaced with the concrete tower that stands today.

The station's name comes from the Five Finger Islands, the small island group between Stephens Passage and Frederick Sound on which it stands. It shares with Sentinel Island Light Station the distinction of being among the first U.S. government lighthouses lit in Alaska, both first lit on March 21, 1902. The 1935 concrete replacement is cited as a good example of Modern Movement architecture adapted by the U.S. Lighthouse Service.

The beacon sends an automated white flash every 10 seconds to help ships navigate at night or in poor visibility conditions. Access to the structure is limited, but viewing the lighthouse from nearby waters reveals the surrounding channels and island formations.

The light was automated on August 14, 1984, making it the last lighthouse in Alaska to be automated. Its 1935 concrete replacement is cited as a good example of Modern Movement architecture, and the station was listed on the National Register of Historic Places in 2004 as a historic district with four contributing buildings and one other contributing structure.