Dames Point Light, Lighthouse site on the St. Johns River in Jacksonville, Florida, United States

Dames Point Light was an iron screw-pile lighthouse standing in 8 feet (2.4 m) of water on six wooden piles fitted with cast-iron sleeves, with two fender piles upstream and downstream. Its fixed white light marked a shoal at a sharp bend of the St. Johns River near the present north pier of the Dames Point Bridge.

The light was authorized by Congress in 1871 and began operating in 1872 to guide ships through this dangerous section of the river. Over time, newer light signals were installed further downriver, making this tower obsolete.

The lightship stationed at the shoal from 1857 carried a foghorn and bell as well as a light, so crews could signal in fog as well as darkness. When the Civil War came, the vessel was towed to Jacksonville and its equipment stored ashore; it did not survive the war, and the shoal went unmarked until 1872.

The site sits along the riverbank and is best accessed by boat, since the structure stands in the water. Views and photographs of the ruins can be captured from nearby land areas or from a river tour.

The light was discontinued on February 28, 1893, after post lights along the St. Johns River made it redundant. Its lantern and lens were shipped to Charleston, South Carolina, and the lantern parapet was roofed over with shingles. The abandoned structure burned down on December 25, 1913.