Walter Ralston Martin, American minister and author, founded the Christian Research Institute (d. 1989)

Walter Ralston Martin (September 10, 1928 – June 26, 1989), was an American Baptist Christian minister and author who founded the Christian Research Institute in 1960 as a para-church ministry specializing as a clearing-house of information in both general Christian apologetics and in countercult apologetics.

As the author of the influential The Kingdom of the Cults (1965), he has been dubbed the "godfather of the anti-cult movement".