Alexandru Dobrogeanu-Gherea or Alexandru Gherea (rendered in Russian as Александр Доброджану-Геря or Доброжану-Гере - Aleksandr Dobrodzhanu-Gerya /Dobrozhanu-Gere; July 7, 1879, Ploieşti—November 4, 1937, Moscow, Soviet Union) was a Romanian communist militant and son of socialist, sociologist and literary critic Constantin Dobrogeanu-Gherea. He also used the pseudonyms of G. Alexe and Saşa/Sasha.
He studied engineering at the University of Berlin, becoming a member of the Romanian Social-Democratic Workers' Party in 1910. During World War I, Gherea served in a field artillery regiment.
He joined the Socialist Party of Romania (the revived form of the Social Democrats) in 1918, and was one of its five delegates (one of the others was Gheorghe Cristescu) to the 1920 Moscow Comintern meeting that called for the Romanian group to follow Bolshevik lines. He was twice elected to the Romanian Parliament (in 1920 and 1922).