The Peshtigo Reef Light is a lighthouse in Marinette County, Wisconsin, United States, offshore in lower Green Bay.

[4] The hazard was addressed in an 1866 appropriation which provided for the construction of a daymark on this shoal as well as for the Chambers Island Light.

Establishment of a buoy and of a lighthouse were rejected due to the ice in the winter; eventually, in 1898, the board requested that a lightship be constructed for the spot.

Coal traffic was heavy, and it was felt that a permanent fixed light would mark the shoal more effectively.

[5] This consisted of a cylindrical house twenty-five feet across and divided into two rooms to provide temporary living quarters for servicing personnel.