SS Toledo was an American Passenger/Cargo ship that sank during a storm in Lake Michigan near Port Washington, Wisconsin, United States on 24 October 1856 with the loss of 39 to 79 lives.

[1] Toledo was built at the Benjamin Buhl Jones shipyard in Buffalo, New York, United States and completed in 1854.

Immediately following the sinking, most of the ship's superstructure had been broken up into fragments and strewn across two miles (3.2 km) of the lake shore near Port Washington, sometimes the debris reached several feet high.

The condition of Toledo's wreck is described as extremely broken up and scattered over a large area while it rests on the lakebed of Lake Michigan on top of sand, rocks and hard packed clay in 20 feet (6 m) of water.

The wreck's debris field begins just two yards (1.8 m) of shore, and the ship's decking, left behind machinery, and smokestack are still intact.