| Princess Catherine of Schleswig-Holstein-Sonderburg-Beck | |
|---|---|
 Portrait by Jean-Louis Voille, 1791. | |
| Born | 23 February 1750 Reval, Russian Empire |
| Died | 20 December 1811 (aged 61) Berlin, Kingdom of Prussia |
| Spouse | Prince Ivan Sergeevich Baryatinsky (m. 1767 – separated 1774) |
| Issue | Prince Ivan Ivanovich Baryatinsky Countess Anna Tolstaya |
| House | Schleswig-Holstein-Sonderburg-Beck |
| Father | Peter August, Duke of Schleswig-Holstein-Sonderburg-Beck |
| Mother | Countess Natalia Nikolaievna Golovina |
Princess Catherine of Schleswig-Holstein-Sonderburg-Beck (23 February 1750 – 20 December 1811), was a German noblewoman and member of the House of Schleswig-Holstein-Sonderburg-Beck. Through her marriage she became Princess Baryatinskaya, being mostly known as Princess Ekaterina Petrovna Barjatinskaya.