Alexander Büchler, or Buchler Sándor (September 24, 1869 in Fülek (Filakovo), Kingdom of Hungary – July 1944, in Auschwitz) was a Hungarian rabbi and educator.
He is a son of the Talmudist rabbi Phineas Büchler of Mór.
He was educated at the gymnasium in Székesfehérvár and at the university and the seminary of Budapest; he received the degree of Ph.D.