Robert Hugh McClellan (January 3, 1823 – July 23, 1902) was an American politician, attorney, and banker from New York City.
McClellan attended private schools and Union College before heading west to Galena, Illinois to practice law.
McClellan decided to move west to practice, settling in Galena, Illinois.
A staunch Republican, McClellan was elected to the Illinois House of Representatives in 1860.
Caroline died in 1876 and McClellan remarried to Clara Dennison Garfield.