Michael Clarkson Ryan's Civil War career is the least impressive of the colonels buried at Greenwood, but his civilian career was rather notable. Born in April, 1820 in Lancaster, Pennsylvania, his family moved to Hamilton in 1832. Ryan graduated from Miami University in 1839, and then Cincinnati Law School in 1842. He was both a newspaper editor and a lawyer, and was a founding member of Beta Theta Pi fraternity while at Miami. He also served as the Butler County Prosecuting Attorney from 1848 to 1852 and Clerk of Courts 1852 to 1858 .
Ryan was commissioned at the colonel of the 50th Ohio but before the regiment was able to be mustered in died on October 23rd, 1861. The 50th did not complete its organization until the summer of 1862.
Ryan is buried in the Hill Section, Lot 446.