| Prince Ernst | |
| Birth Date: | 27 May 1904 |
| Birth Place: | Konopiště, Bohemia, Austro Hungarian Empire |
| Death Place: | Graz, Austria |
| Father: | Archduke Franz Ferdinand of Austria |
| Mother: | Sophie, Duchess of Hohenberg |
| Spouse: | Marie-Thérèse Wood |
| Noble Family: | Hohenberg |
| Issue: | Prince Franz Prince Ernst |
| Religion: | Roman Catholicism |
Prince Ernst of Hohenberg (Ernst Alfons Franz Ignaz Joseph Maria Anton von Hohenberg; 27 May 1904 - 5 March 1954) was the second son of Archduke Franz Ferdinand of Austria and his morganatic wife Sophie, Duchess of Hohenberg, who were assassinated at Sarajevo in 1914.
Prince Ernst was born at his parents' estate at Konopiště in Bohemia. Following his parents' assassination, which precipitated World War I, Ernst and his siblings, Sophie and Maximilian, were taken in by their uncle, Prince Jaroslav von Thun und Hohenstein.
In late 1918, their properties in Czechoslovakia, including Konopiště and Chlumec nad Cidlinou, were confiscated. The children moved to Vienna and Schloß Artstetten.
In 1938, following the Anschluss, some of the family members were arrested. Prince Ernst, having previously spoken at pro-monarchist meetings and having publicly opposed the Anschluss, was sent to Dachau concentration camp with his brother. Prince Ernst was later transferred to other camps and was freed in 1943. The family's Austrian properties were confiscated in 1939, but they were returned in 1945.
Prince Ernst married on 25 May 1936 in Vienna, Marie-Thérèse Wood (9 May 1910 in Vienna – 28 November 1985 in Radmer). She was daughter of Captain George Jervis Wood (1887-1974) and his wife, Countess Rosa Lónyay de Nagy-Lónya et Vásáros-Namény (1888-1970), daughter of Count Albert Lónyay de Nagy-Lónya et Vásáros-Namény (1850-1923) and Princess Marie of Hohenlohe-Bartenstein (1861-1933), elder sister of Princess Eleonora Fugger von Babenhausen. The couple had two children:
Prince Ernst died at Graz in Austria in 1954, aged 49, his death considered to be connected to mistreatment he suffered in the concentration camps. He is buried in the crypt of the Hohenberg family's Artstetten Castle in Lower Austria.[1] His wife's remains are in a sarcophagus to the right of his.