Kazimierz Dluski (Polish pronunciation: [ka'?imj?? 'dwusk?i]; 1855–1930) was a Polish physician, and social and political activist.
He was a member of the Polish Socialist Party.
In later life, he was a founder and activist of many non-governmental organizations; he was the founder and first president of the Tatrzanskie Ochotnicze Pogotowie Ratunkowe (Tatras Volunteer Rescue Service).
He married fellow Polish physician Bronislawa Sklodowska, an elder sister of Marie Sklodowska-Curie.