Peter McAdams (April 21, 1834 – September 29, 1926) was an Irish American soldier who fought in the American Civil War. He emigrated to America at the age of 14 and worked initially as a shoemaker. Upon the outbreak of the Civil War, he enlisted in the Union Army. McAdams fought with the 98th Pennsylvania Infantry at the Battles of Williamsburg and Fredericksburg. He received a promotion to sergeant for his action in rescuing a wounded comrade at the Battle of Salem Church on May 3, 1863. McAdams was later commissioned as an officer and fought in this role at the Battle of Cold Harbor. He was seriously injured and left the army after the war. McAdams was awarded the Medal of Honor on April 1, 1898.