Nicolae L. Lupu (November 4, 1876 – December 4, 1946) was a Romanian left-wing politician and social physician.[1] Originally a leader of the Labor Party, which was joined with the Peasants' Party, Lupu served as Interior Minister in 1919–1920.[1] He formed his own Peasants' Party–Lupu in 1927, and also steered the creation of a League Against Usury; the party dissolved in 1934. His group became a dissident faction of the National Peasants' Party, and was reestablished, after World War II, as the Democratic Peasants' Party–Lupu.[2]