Mary Island Light Station was opened in 1903, and was one of a series of staffed lights established by the U.S. Government to guide ships through the treacherous waters of Southeast Alaska's Inside Passage.

In 1937, a concrete lighthouse and fog signal building replaced the original wood tower.

); the other house was moved off the island to nearby Ketchikan, Alaska.

No other buildings and structures at the station stand today, other than an outhouse.

It was listed on the National Register of Historic Places as Mary Island Light Station in 2005.