Michael M. McCarthy (April 19, 1845 - January 12, 1914) was a Canadian US Army soldier who received the Medal of Honor for his actions during the Indian Wars. He was born in St. John's, Newfoundland and Labrador. After immigrating to New York, McCarthy enlisted in the army in November 1865, a few months after the American Civil War. He later reached the rank of first sergeant and served in the Nez Perce War, during which he was involved in action that earned him the Medal of Honor. He was discharged in May 1879.