Prince Kazimierz Czartoryski (4 March 1674 – 31 August 1741) was a Polish nobleman, Duke of Klewań and Żuków [pl].

Kazimierz became Podczaszy of Lithuania since 1699, Grand Treasurer of Lithuania in 1707–1709, nominated by King Stanisław Leszczyński.

Castellan of Vilnius since 1724 and starost of Krzemieniec, Wieliż and Uświaty.

He supported the candidature of François Louis, Prince of Conti for the Polish throne in 1697.

This biography of a Polish noble is a stub.