Two ships of the Royal Navy have been named HMS Sidon after Sidon, a city in Lebanon:
- HMS Sidon was a first-class paddle frigate launched in 1846 and scrapped in 1864.
- HMS Sidon was a S-class submarine launched in 1944. She sank in Portland harbour in 1955 as a result of an accidental torpedo explosion, was subsequently raised and then sunk as a target in 1957.