Ivan Ahčin (March 9, 1897, Domžale – February 16, 1960) was a Slovene sociologist, journalist, author and politician. He studied theology at the University of Ljubljana, where he graduated in 1925. He later worked as a professor of sociology at the University of Ljubljana. Between 1929 and 1941 he was also the editor of the daily newspaper , the official organ of the Slovene People's Party and one of the two most influential newspapers in Slovenia. He was one of the closest collaborators of the conservative Slovene politician Anton Korošec.