Aleksey Samuilovich Greig (Russian: Алексе́й Самуи́лович Грейг) (6 September 1775 – 18 January 1845), born into the noble Greig family, was an admiral of the Imperial Russian Navy. Born in Kronstadt, he was the son of Admiral Samuel Greig (1735–1788, then Governor of Kronstadt), brother-in-law of Mary Somerville, and father of General Samuil Greig (1827–1887), Russian Minister of Finance.
He studied at the Royal High School, Edinburgh under the Rector Alexander Adam from 1783 to 1785, and then served as a volunteer on board HMS Culloden, under Captain Thomas Troubridge.
