Roswell Fenner Cottrell (January 17, 1814 – March 22, 1892) was a preacher, counselor, writer, hymnist and poet who came from a family of Seventh Day Baptists. He was the son of John Cottrell (1774–1857) and Mary Polly Stillman (1779–1852) After joining the sabbatarian Adventists who eventually organized the Seventh-day Adventist Church, he became one of their leading advocates.