Swallow was a 6-gun unrated Ketch which served in the English Royal Navy, bought in 1661.

[2] The term "Ketch" refers to a two-masted sailboat whose mainmast is taller than the mizzen mast (or aft-mast),[3] generally in a 40-foot or bigger boat.

[4] When bought in 1661, Swallow was valued as £355.9.0d and was commissioned 18/5/1661 under Captain Francis Sparrow until 8/12/1662; in the Mediterranean 1662.

John Berry until 6.2.1666, during this time, on 8/12/1665, Sparrow took 3 prizes into Dover, laden with wine and brandy, and on 9/12/1665 Sparrow took 2 prizes into Deal, A fly-boat about 100 tons and a Hoy, both out of Bordeaux.

Benjamin Symonds until 21.7.1668, it was eventually sold in May 1674.