Marko Došen (7 July 1859 – 7 September 1944) was a Croatian politician and writer.
Born in Mušaluk (now part of Gospić), Došen finished elementary school in Lika and one grade of gymnasium in Bjelovar. He entered into trade, but in 1890 moved to Russia where he opened a bookstore in Saint Petersburg. Together with a Russian historian M. Filippov he published the book Hrvati i njihova borba s Austrijom (Croats and their struggle against Austria). He returned to Gospić in 1893 and the following year started his weekly magazine Hrvat which he edited for ten years.
He was a member of Starčević's Party of Rights in the Croatian Parliament from 1913 to 1918. Since 1918 he was a member of the Croatian Republican Peasant Party (HRSS). He was elected into the national assembly of the Kingdom of Serbs, Croats and Slovenes in 1920, 1923 and 1925. After the Pašić–Radić agreement in 1925 he ended his association with Radić's HRSS. After King Alexander declared a royal dictatorship on 6 January 1929, Došen became a member of the Ustaša, a Croatian revolutionary organization. With Andrija Artuković, Došen was the main organizer of the Velebit Uprising in 1932.