Samuel Fleming Barr (June 15, 1829 – May 29, 1919) was a Republican member of the U.S. House of Representatives from Pennsylvania. Samuel F. Barr was born near Coleraine, County Londonderry on the island of Ireland (the entirety of which was then part of the U.K.). He immigrated to the United States in 1831 with his parents, who settled in Harrisburg, Pennsylvania. He attended the common schools, and worked as a freight agent of the Pittsburgh, Fort Wayne & Chicago Railroad in 1855 and 1856. Early in the United States Civil War was employed upon government railways in and about Washington, D.C. He worked as editor of the from 1873 to 1878.