Santeri "Santtu" Nuorteva (29 June 1881 – 31 March 1929), born Alexander Nyberg, was a Finnish-born Soviet journalist and one of the first members of the Finnish parliament. Nuorteva served in the Finnish parliament as a member of the Social Democratic Party from 1907–1908 and 1909–1910. Nuorteva emigrated to the United States in 1911 and played a leading role in the sizable Finnish-language socialist movement in America, editing at various times he edited the magazines Säkeniä ("The Spark") and the newspapers Toveri ("The Comrade") and Raivaaja ("The Pioneer"). He was the official spokesman in America for the Finnish Socialist Revolutionary government of 1918 and, after its overthrow, was influential in the official affairs of the government of Soviet Russia in the United States. In 1920 he was deported to Soviet Russia.
Santeri was named Alexander Nyberg when he was born in Viipuri, Grand Duchy of Finland on June 29, 1881. His father Claes Fredrik Nyberg was a telegraph officer and his mother was Russian Jewish-born Anna Aleksandrovna Saharova. Even before graduating from high school Santeri was working in a shop and as a seaman and boilerman. After graduating high school in 1904 he started to work as a teacher and journalist in Forssa. He was a language teacher at Forssa primary school in 1904–1907 and editor of the Forssa News in 1904–1906.
After leaving Forssa, Nuorteva worked as journalist for the magazine Socialist in Turku in 1908 and then as editor of the magazine Kansan in Tampere in 1909-11. Nuorteva was imprisoned because of Lèse majesté in 1909.