Grzegorz Antoni Oginski (b. on June 23, 1654 - d. October 17, 1709 in Lublin) was a Polish-Lithuanian Hetman and governor-general of the Duchy of Samogitia from 1698.
Oginski was one of the leaders of the uprising against the Sapieha Lithuanian magnates. He was successful in the Lithuanian Civil War which culminated in the Battle of Olkieniki on November 18, 1700. After the battle, Michal Franciszek Sapieha the main leader of the Sapieha faction, as well as many other members of the family and its supporters, were murdered by a drunken mob of szlachta.
Oginski was a supporter and close associate of King Augustus II. He was made the Field Hetman of Lithuania on 20 November 1703 and in 1709 the Great Hetman of Lithuania. He was made a Knight of the Order of the White Eagle in 1705.
His father was Jan Jacek Oginski (d. 1684), also a Hetman. He was married to Teofila Czartoryska and had a son, Kazimierz Marcjan Oginski (d. 1727) and a daughter Elzbieta Magdalena Oginska.