John Lafayette Girardeau (14 November 1825 23 June 1898) was a Reformed theologian and minister in the Presbyterian Church in the United States. He is notable as a Calvinist defender of libertarianism, the teaching that Adam, as the representative man, could have chosen between alternatives, and that he could have chosen differently in the pre-fall state, rather than a determinist or compatibilist view.
He was a professor of systematic theology at Columbia Theological Seminary in South Carolina.