HMS Ferret (1784) was a 12-gun brig-sloop launched in 1784 and sold in 1801; she then became a whaler, making six voyages to Brazil, the South Pacific, and New Zealand between 1802 and 1815.
HMS Ferret was a 14-gun gun-brig, previously the American privateerRapid. After HMS Maidstone captured her in 1813 she became HMS Nova Scotia. The Admiralty renamed her HMS Ferret in 1813 and sold her in 1820.