Leon Feiner (nom-de-guerre "Mikołaj" (Michael), "Berezowski") (1885 in Krakow – February 22, 1945, in Lublin) was a Polish lawyer, an activist of the General Jewish Labour Bund in Poland and between November 1944 and January 1945 the director (prezes) and vice-chairman of the Council to Aid Jews "Żegota".