Robert Murphy Nevin (May 5, 1850 – December 17, 1912) was an American attorney and three-term member of the United States House of Representatives from Ohio from 1901 to 1907.

After graduation, Robert M. Nevin moved to Dayton, Ohio, where he pursued the study of law under the tutelage of Thomas O. Lowe.

When Lowe was elected to the bench of the superior court, Nevin entered the office of Conover & Craighead, well-known attorneys, where he completed his study of law until admitted to the bar in Montgomery County, Ohio in 1871.

In November 1871, Robert Murphy Nevin was united in marriage to Miss Emma Reasoner of Dresden, Ohio.

R. M. Nevin was a distinguished criminal lawyer and occupied a prominent place at the Ohio bar as counsel for the New York Central Railroad for thirty years (1882–1912).