Katarzyna Opalińska was born on 13 October 1680, in Poznań, Poland. She was the daughter of Zofia Czarnkowska and Jan Karol Opaliński. Katarzyna Opalińska married Stanislaw Leszczyński (20 October 1677 - 23 February 1766) on 10 May 1698 in Kraków. He was the son of Anna Katarzyna Jablonowska and Rafal Leszczyński, voivode of Poznań Voivodeship.
The Children of Katarzyna Opalińska and Stanislaw Leszczyński:
Anna Leszczyńska (1699-)
Maria Karolina Zofia Felicja Leszczyńska (23 June 1703 - 24 June 1768) Married Louis XV, King of France and Navarre in 1725.