Port Leon is classified as an "extinct city" by the State Library and Archives of Florida, and only remnants can be found today.
A bridge across the St. Marks River connected the port to the railroad, facilitating the loading of cotton onto ships bound for the east coast of the United States.
On September 13, 1843, a strong hurricane with a 10-foot (3 m) storm surge hit the area and destroyed Port Leon as well as heavily damaging nearby Magnolia and St. Marks.
[3] Port Leon had several hundred citizens at its peak with 8 to 10 businesses, some wharves, warehouses, a hotel, two taverns, a newspaper and an annual fair.
One of the successful citizens was Daniel Ladd who had married into the Hamlin family from Maine that established the town of Magnolia.