HMS Grecian was a sixteen-gun Acorn-class brig-sloop built for the Royal Navy during the 1830s.

[1] Grecian was armed with sixteen 32-pounder carronades.

The Acorn class had a crew of 110–30 officers and ratings.

[2] Grecian, the third ship of her name to serve in the Royal Navy,[3] was ordered on 31 December 1835, laid down in July 1837 at Pembroke Dockyard, Wales, and launched on 24 April 1838.

[2] She was completed on 10 December 1838 at Plymouth Dockyard and commissioned on 19 September of that year.