Six vessels of the Royal Navy have been named HMS Sylph after the air spirits known as sylphs:
HMS Sylph (1776) was a 14-gun sloop purchased by the Royal Navy in 1776, previously the merchant Lovely Lass. She was renamed Lightning when she became a fire ship in 1779. She was sold in 1783.
HMS Sylph (1780) was an 18-gun sloop purchased by the Royal Navy in 1780, previously the merchant cutterActive. She was captured by France in 1782 and served that country until 1788.
HMS Sylph (1832) was a 2-gun cutter launched in 1821 for the Post Office Packet Service but was never used. She was taken up by the Royal Navy in 1832 as a tender and lent to HM Customs as a watch vessel in 1862. She was sold in 1888.