Balthasar Walther (1558 – c. 1631) was a Silesian physician and Christian Kabbalist of German ethnicity. Born in Liegnitz in modern Poland, Walther was a significant influence on the thought of the German theosopher Jakob Böhme. As an itinerant Paracelsian enthusiast, Walther was active throughout the Holy Roman Empire, in Poland, Transylvania and elsewhere. He died in Paris sometime before December 1631.