The Marrowstone Point Light is an active navigational aid overlooking Admiralty Inlet at the northern tip of Marrowstone Island, Jefferson County, Washington, in the United States.

[5] A fog bell was added to the station in 1896, and a one-and-a-half-story dwelling was constructed on the point to house Marrowstone Point's first station keeper, Osmond Hale Morgan (1826–1907), a sea captain, who came from Whidbey Island with his wife, Frances Elizabeth (Avery) Morgan (1833–1899), and five children.

After mariners complained that the fog bell at the point was often inaudible, a small, square cement building outfitted with three large trumpets was put into service in 1918.

The light was also mounted on top of the fog signal building.

[4] The grounds are now the site of the U.S. Geological Survey's Marrowstone Marine Field Station, with the original keeper's quarters used for office and living space.