Charles H. Marsh (c. 1840 – January 25, 1867) was a Union Army soldier in the American Civil War and a recipient of the United States military's highest decoration, the Medal of Honor, for his actions during a skirmish in the Valley Campaigns of 1864.

He was found with a letter which indicated to the Confederates that he may be a spy, and he was jailed at Castle Thunder, a facility in Richmond for civilian prisoners and Union agents.

On July 31, 1864, in the Back Creek valley of western Virginia, his unit conducted a raid on Confederate General Jubal Early's troops.

"[3] Marsh took part in the Battle of Spotsylvania Court House of May 1864 and reached the rank of corporal before leaving the military in August 1865.

[2] He is one of only two Milford residents to have received the Medal of Honor, the other being Indian Wars officer George W.