Robert Annan (1742–December 5, 1819) was a Scottish-born Associate Reformed Presbyterian minister and early American church leader who studied theology at the University of St. Andrews, was licensed in Scotland, and sent as a missionary to the American colonies in 1761. He served as pastor in several congregations—including Neelytown, New York, Philadelphia’s Old Scots Church, and in Baltimore—was a strong advocate of the American cause during the Revolution, and contributed to early Presbyterian theological literature such as An Overture Illustrating and Defending the Doctrines of the Westminster Confession of Faith. Annan retired in Pennsylvania in his later years and is remembered for his influential ministry and published writings defending historic Reformed doctrine.