Six ships of the Royal Navy have borne the name HMS St Lawrence:
was a schooner purchased in 1764 and burnt after being struck by lightning in 1766. was a 10-gun schooner purchased in 1767, decommissioned in 1775, and sold in 1776. was a schooner purchased in 1775 and sold in 1783. was a 12-gun schooner, formerly the American privateer Atlas. She was captured in 1813, but recaptured by the American privateer in 1815. was a 112-gun first rate launched in 1814 and sold in 1832. HMS St Lawrence was a 38-gun fifth rate launched in 1806 as . She was converted into a receiving ship and renamed HMS St Lawrence in 1844, and was broken up in 1859.
See also Ships of the Royal Canadian Navy named