SS Frank O'Connor was a bulk carrier that sank in Lake Michigan off the coast of North Bay, Door County, Wisconsin, United States.

[3] On September 29, 1919, Frank O'Connor left Buffalo, New York en route to Milwaukee, Wisconsin carrying 3,000 tons of coal.

Roughly an hour later, the ship's steering gear was destroyed by the fire, leaving it drifting in the water about two miles off the coast of Cana Island.

The keeper of the Cana Island Light had noticed the burning vessel from land and, along with his assistant, was able to tow the O'Connor's crew on their lifeboats to shore.

[5] Despite the fire, most of Frank O'Connor's machinery remained intact and upright, making it a popular archaeological and recreational site.