| Kazimierz Czartoryski | |
| Spouse: | Izabela Elżbieta Morsztyn |
| Issue: | with Izabela Elżbieta Morsztyn Michał Fryderyk Czartoryski August Aleksander Czartoryski Konstancja Czartoryska Teodor Kazimierz Czartoryski Ludwika Elżbieta Czartoryska |
| Noble Family: | Czartoryski |
| Father: | Michal Jerzy Czartoryski |
| Mother: | Joanna Weronika Olędzka |
| Birth Date: | 4 March 1674 Warsaw, Poland |
| Death Date: | Warsaw, Poland |
Prince Kazimierz Czartoryski (4 March 1674 - 31 August 1741) was a Polish nobleman, Duke of Klewań and .
Kazimierz became Podczaszy of Lithuania since 1699, Grand Treasurer of Lithuania in 1707 - 1709, nominated by King Stanisław Leszczyński. He was also Deputy Chancellor of Lithuania in 1712 - 1724. Castellan of Vilnius since 1724 and starost of Krzemieniec, Wieliż and Uświaty.
He founded the "Familia" during the interregnum in 1696 - 1699. He supported the candidature of François Louis, Prince of Conti for the Polish throne in 1697.
In 1693 he married Izabela Morsztyn, daughter of Jan Andrzej Morsztyn and Katarzyna Gordon.[1] They had three sons and two daughters.