Franz Joseph I, Prince of Liechtenstein, born Franz de Paula Josef Johann Nepomuk Andreas (19 November 1726 – 18 August 1781), was the Prince of Liechtenstein from 1772 until his death.

[1] Born in Milan, in what is now northern Italy, he was the son of Prince Emanuel of Liechtenstein and Maria Anna Antonia, Countess of Dietrichstein-Weichselstädt, Baroness zu Hollenburg und Finkenstein (10 September 1706 – 7 June 1777).

Franz Joseph had been recognised heir to Liechtenstein since 1723, when his uncle's only son had died.

The battle was a victory for the Holy Roman Empire, of which Liechtenstein was a part.

Franz Josef married Marie Leopoldine Gräfin von Sternberg (Vienna, 11 December 1733 – Feldsberg, 27 June 1809), a member of the Bohemian nobility, on 6 July 1750 in Valtice or Feldsberg.