Otto Roth, occasionally rendered as Willy Otto Roth or Dr. Rot (Hungarian: Róth Ottó; 6 December 1884 – 22 April 1956), was a Hungarian and Romanian lawyer and politician who served as the only Commissioner-in-Chief of the Banat Republic, between October 1918 and February 1919. Hungarian Jewish but non-religious, he entered politics with the Hungarian Social Democratic Party (MSZDP) while still a subject of the Kingdom of Hungary. Roth was a local councilor in Timișoara during most of World War I, emerging as a regional leader of the MSZDP before and during the Aster Revolution. He is credited with proclaiming the Banat Republic on 31 October 1918, though the initiative was also attributed to Albert Bartha, who briefly served as its military leader. The state was an autonomous extension of