USS Clyde was a paddle steamer captured by the Union Navy during the American Civil War, and commissioned to patrol Florida waters.

She had been built in 1861 in Glasgow, Scotland as the Clyde passenger steamer Neptune, but sold in 1863 to become a blockade runner, making two successful round trips to Mobile, Alabama before capture.

[1] The ship was powered by a two-cylinder diagonal direct-acting steam engine, rated at 100 nhp and 995 ihp, also made by Napier, and driving a pair of side paddles.

[5] She also ran the full route to Glasgow, occasionally becoming involved in the dangerous practice of racing against her crack rivals of 1861, Ruby and Rothesay Castle.

Sent to New York City to be surveyed and appraised, she was purchased by the Navy Department and placed in commission on 29 July 1863, Acting Master A.