Archibald Alexander (April 17, 1772 – October 22, 1851) was a prominent American Presbyterian theologian and minister born in Rockbridge County, Virginia, who was ordained in 1791 and served as president of Hampden–Sydney College before being called to pastoral and academic roles. In 1812 he became the first professor and principal of the newly established Princeton Theological Seminary, where he taught didactic and polemic theology for nearly forty years and shaped generations of Presbyterian ministers. A prolific author and respected preacher, Alexander’s writings and leadership helped define early 19th-century American Presbyterianism.