Sahak Mirzoyi Ter-Gabrielyan (Armenian: ????? ???-??????????; 15 February 1886, Shusha – 19 August 1937) was a Soviet Armenian statesman.
In 1928–1935 he was the Prime-Minister (chairman of Sovnarcom) of Armenian SSR.
Since 1904 he was a communist activist in Baku.
In 1918 during the Baku Communa he was the Oil Minister and the chairman of Emergency Commission.
In 1920 he was a member of the Revolutionary Committee of Armenia, since 1921 – the permanent representative of Armenian SSR (then – Transcaucasian Federation) in Russian SFSR.
He was also a victim of Stalinism as he died in the Great Purge.