Zygmunt Bychowski (also known as Szneur Zalman Bychowski; שניאור זלמן ביחובסקי; 18 August 1865 – 13 September 1934) was a Polish Jewish neurologist, social activist, and politician. He served as a magistrate of the City of Warsaw (1923–1934) and was a Jewish and Zionist leader in Poland.