Vincenz Liechtenstein (30 July 1950 in Graz – 14 January 2008 in Deutschfeistritz, Styria) was an Austrian politician (ÖVP). He was a grandson of Charles I of Austria, the last Austrian Emperor. He was born a Prince of Liechtenstein and never renounced his right of succession to that monarchy, but since the nobility in Austria was officially abolished in 1919, after the fall of the Austro-Hungarian Empire, he did not use his princely title or honorific (Serene Highness) in his Austrian civic life.
Born His Serene Highness Prince Vincenz Karl Alfred Maria Michael of Liechtenstein (Germ. Seine Durchlaucht der Prinz Vincenz Karl Alfred Maria Michael von und zu Liechtenstein), the first child of Prince Heinrich of Liechtenstein and Archduchess Elisabeth of Austria. Prince Heinrich was a son of Prince Alfred of Liechtenstein (himself a son of Prince Alfred of Liechtenstein) and Princess Theresia Maria of Oettingen-Oettingen. Vincenz was thus a male-line great-great-great-grandson of Johann I Joseph, Prince of Liechtenstein. Vincenz' mother, Archduchess Elisabeth, was the youngest daughter of Charles I, the last Emperor of Austria, and his wife, Zita of Bourbon-Parma. Vincenz Liechtenstein is a female-line great-grandson of Robert I, the last sovereign Duke of Parma.
- Princess Adelheid Marie Beatrice Zita (b. Vienna, 25 November 1981), married in Deutschfeistritz-Peggau on 31 January 2009 Count Dominic von Coudenhove Kalergi (b. London, 7 October 1973), son of Count Hans Heinrich von Coudenhove Kalergi and wife Cornelia Carter Roberts
- Princess Hedwig Maria Beatrice Hermine (b. Vienna, 28 November 1982), married in Schloss Waldstein on 10 May 2008 Comte Olivier de Quélen (b. Paris, 25 April 1980), son of Jean-Louis, Comte de Quélen and wife Nicole Cansou
He married Roberta Valeri Manera (1953–) in 1999 though the two had no children.
Vincenz studied at the Bundesrealgymnasium in Graz (1960–1969) and subsequently studied law at the University of Graz (1969–1975). He worked at a forestry company before becoming a politician. He was co-founder of the 1974 JES students initiative. He was a member of the board of the Catholic Family Association and the Sudetendeutsche Landsmannschaft.
Vincenz was a member of the Nationalrat from 1988–1996 and again from 1997–2004. From 2004–2006 he was a member of the Bundesrat. He caused a mini-scandal in 2005 when he interrupted a Nationalrat meeting because of alleged drunkenness. He apologised shortly afterward.
Liechtenstein died unexpectedly on 14 January 2008 at his house near Graz.