Navaandorjiin Jadambaa

Navaandorjiin Jadambaa (Mongolian: Наваандоржийн Жадамбаа; sometimes spelled Jadamba in English) (1900–1939) was a Mongolian communist politician and revolutionary during the late Bogd Khanate and the early socialist era. He briefly served as the first republican head of state of socialist Mongolia after the death of Bogd Khan.

In 1922, Jadambaa co-founded the Mongolian Revolutionary Youth Union with the writer S. Buyannemeh. Throughout the 1920s, he took up a variety of governmental positions, including deputy chairman of the Mongolian People's Revolutionary Party's Central Committee (1924–1928), chairman of the Revolutionary Youth Union's Central Committee, minister of economics, editor of the newspaper People's Army (Mongolian: Ардын цэрэг), and deputy board chairman of the Mongolian-Soviet Joint Stock Bank.

At the MPRP's Seventh Congress (1928), Jadambaa was dismissed from all his posts after being accused of "Right Opportunism". He was exiled to the Soviet border town of Kyakhta in 1929. In the subsequent years, he managed to obtain an economics degree in Moscow, but was unable to return to Mongolia. He did a number of jobs in Moscow, possibly as an engineer at a footwear factory, and translated works by Boccaccio, Swift and Andersen into Mongolian. He was officially expelled from the MPRP in 1931. In 1937 or 1938, under the Choibalsan regime, he was arrested and sentenced to 10 years imprisonment for antistate activities. He died of illness while imprisoned in an unknown location in 1939.