Ludwig Karl August von Hagemeister (Russian: ???´???? ??????´????? ??????´?????; Leontij Andrianovic Gagemejster; 16 June [O.S.
5] 1780 – 3 January [O.S.
22 December 1833] 1834) was a Baltic German naval officer who held the rank of Captain of the 1st rank in the Imperial Russian Navy.
He was a maritime explorer of Alaska and the Pacific Ocean, and served briefly in 1817-1818 as the second Chief Manager of the Russian-American Company.