Karol Daniel Kadłubiec (born 22 July 1937) is a Polish Czech ethnographer, folklorist and historian.

Kadłubiec graduated from Polish primary school in Bystřice, Polish gymnasium in Český Těšín in 1955 and then from Slavic philology at the Charles University in Prague in 1960.

He works at a Pedagogical Institute at the University of Ostrava from 1964 and later worked at the Charles University in Prague as a head of department of Polish studies and folkloristic.

Kadłubiec is a head of Institute for Studies of Polish Ethnic in the Czech Republic at the University of Ostrava from 1990.

He is author of several books and of about 600 scientific discourses and articles and long-time contributor to Zwrot magazine.