| Konstancja Poniatowska | |
| Spouse: | Ludwik Skumin Tyszkiewicz |
| Issue: | Anna Tyszkiewicz |
| Coa: | Ciołek |
| Noble Family: | Poniatowski |
| Father: | Kazimierz Poniatowski |
| Birth Date: | 2 March 1759 unknown |
| Death Date: | Paris, France |
| Full Name: | Ks. Konstancja Poniatowska herbu Ciołek |
Princess Konstancja Poniatowska (1759–1830) was a Polish noblewoman, niece of king Stanisław August Poniatowski.
Konstancja was the daughter of Kazimierz Poniatowski and Apolonia Ustrzycka, and married Ludwik Skumin Tyszkiewicz on April 4, 1775 in Warsaw.[1] She was one of the closest friends of the French Minister of Foreign Affairs, Charles Maurice de Talleyrand-Périgord.