USS Sibyl (1863)
 USS Sibyl (1863) was a wooden-hull steamer outfitted with heavy guns purchased by the Union Navy during the American Civil War. Sibyl was used by the Union Navy primarily as a dispatch boat in the blockade of ports and waterways of the Confederate States of America. She carried messages (dispatches) between ships and shore; but with her heavy guns she was also prepared to act as a gunboat if the need presented itself.