| Eleonore Barbara | |
|---|---|
| Duchess of Troppau and Jägerndorf | |
 | |
| Princess consort of Liechtenstein | |
| Tenure | 12 March 1718 – 11 October 1721 |
| Born | 4 May 1661 Prague, Kingdom of Bohemia Holy Roman Empire |
| Died | 10 February 1723 (aged 61) Vienna, Archduchy of Austria Holy Roman Empire |
| Burial | Paulanerkirche, Vienna |
| Spouse | Anton Florian, Prince of Liechtenstein |
| Issue | Joseph Johann Adam, Prince of Liechtenstein Princess Anna Maria |
| House | Thun und Hohenstein |
| Father | Count Michael Oswald von Thun und Hohenstein |
| Mother | Countess Elisabeth von Lodron |
Countess Eleonore Barbara Catharina von Thun und Hohenstein (4 May 1661 – 10 February 1723) was an Austrian noblewoman who, as the wife of Anton Florian, Prince of Liechtenstein, was the Princess of Liechtenstein from 1718 to 1721. She accompanied her husband on diplomatic missions to Rome and Barcelona. After her husband's death in 1721, she spent the remaining two years of her life in Vienna. Her husband was succeeded by their son, Prince Joseph Johann Adam. Eleonore's daughter, Princess Anna Maria, later became Princess consort of Liechtenstein as the wife of Joseph Wenzel I.