HMS Cossack was a Royal Navy Banterer-class post ship of a nominal 22 guns, launched in 1806 at South Shields, England.

By the time that Captain George Digby commissioned her in early 1807, the Admiralty added two brass howitzers to her armament, while exchanging her 9-pounders for 32-pounder carronades.

[5] In June 1808 Cossack and Comet went to St Andero to assist Spanish loyalists and bring off any British subjects.

[7] By 29 June 1808 she was off France when she, Seine, Comet and Unicorn captured the French brig Pierre Caesar.

[1] Under Stanfell Cossack escorted a convoy to Jamaica and then served on the North America station where she was damaged in a storm.

On 19 March 1815, Cossack assisted the American schooner Thistle, earning for herself a share of the salvage money.

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