Sixtus Armin Thon (10 November 1817, Eisenach – 26 September 1901, Weimar) was a German painter, etcher and lithographer.

[1] He was born in Eisenach, the son of naturalist and mineralogist Theodor Thon, who was also an amateur engraver.

In 1837, he studied painting at the Academy of Fine Arts, Leipzig, then transferred to the Weimar Princely Free Drawing School, where his primary instructor was Friedrich Preller the Elder.

He also took study trips to the Netherlands and Norway and completed his training at the Royal Academy of Fine Arts Antwerp.

He was largely known for landscapes and genre scenes, but the etchings and lithographs he made for Die Gartenlaube and other publications are probably his most familiar works.