Prince Kazimierz Lubomirski (Polish: [kaˈʑi.mjɛʂ lu.bɔˈmir.ski]; 16 July 1869 – 15 December 1930) was a Polish diplomat, nobleman, politician, and sports activist. He was the first envoy of Poland to the United States, serving from 1919 to 1922. He was also a chairperson of the Polish Olympic Committee from 1921 to 1929, and a member of the International Olympic Committee in 1923. Additionally, from 1903 to 1913, he was a member of the Diet of Galicia and Lodomeria for Myślenice electoral district. He came from the Lubomirski noble family.