Klaas Runia (7 May 1926 in Oudeschoot – 14 October 2006 in Kampen) was a Dutch theologian, churchman and journalist.
He studied at the Free University, Amsterdam and obtained his doctorate with a dissertation on the concept of theological time in Karl Barth in 1955.
During his time in Australia he exerted much influence on evangelical Christians, particularly at universities and theological schools.
He also wrote many articles in the Frisian daily newspaper Friesch Dagblad.
He retired in 1992, but remained active as a theologian and journalist until his death in 2006.