The House of Poniatowski (plural: Poniatowscy) is a prominent Polish family that was part of the nobility of Poland.

A member of this family, Stanisław Poniatowski, was elected as King of Poland and reigned from 1764 until his abdication in 1795.

The first information about the family dates back to the end of the 15th century, when they appeared in Poniatowa, 40 km west from Lublin in about 1446.

On 7 September 1764, at Wola, the most famous member of the family, Stanisław Poniatowski, was elected as King of Poland and Grand Duke of Lithuania.

Nowadays, there are still Poniatowscy living in Poland, France, Mexico, Italy, Russia, the United States, Germany, and many other countries in the world.