Michael Joseph McNally (June 29, 1860 – November 2, 1916) was a United States Marine Sergeant who received the Medal of Honor for actions during the Second Samoan Civil War.

He fought at the First Battle of Vailele on April 1, 1899, and was subsequently awarded the Medal of Honor along with Private Henry L. Hulbert.

McNally joined the Marine Corps from Mare Island, California in December 1897, and retired in January 1915.

[2] On the night of 1 and 2 November 1916, he disappeared from a Baltimore Steam Packet Company steamer; his body was recovered some three weeks later, and he was buried in Portsmouth, Virginia.

Citation: For distinguished conduct in the presence of the enemy at Samoa, Philippine Islands, 1 April 1899.McNally is sometimes erroneously referred to as Michael L. McNally.