Countess Leon, or Elisa Heuser Leon (1799–1881), was a founder and leader of the communal Germantown Colony established in 1835 north of Minden in the U.S. state of Louisiana.A native of Frankfurt, Germany, Countess Leon was the daughter of Johann and Anna Maria Heuser. She claimed to have married Bernhard Müller, a Christian mystic also of Germany, who was known as Count Leon, or Count de Leon.