Yom-Tov Lipmann ben Solomon Muhlhausen (Hebrew: יום טוב ליפמן מילהאוזן) was a controversial Talmudist, kabalist and philosopher of the 14th and 15th centuries (birth date unknown, died later than 1420). His religious and scholarly career and influence spanned the Jewish communities of Bohemia, Poland, Austria and various parts of Germany, and his dispute with the principles of Christianity left a lasting imprint on the relations between Christianity and Judaism.