Karl Kälin or Carl Kälin (Einsiedeln, 5 May 1870-Basel, 1 January 1950) was a Swiss Jesuit priest, translator and writer.
His father was the writer Eduard Kälin.
He was ordained a priest in 1901, and served in several parishes in Switzerland.
He was also an editor in the magazine Die katholischen Missionen.
This article about a Swiss writer or poet is a stub.