Walter Goodale Morrill (November 13, 1840 – March 3, 1935) was a Union Army officer in the American Civil War and a recipient of the U.S. military's highest decoration, the Medal of Honor, for his actions at the Second Battle of Rappahannock Station. Morrill was raised in Williamsburg, Maine. In 1861 the age of 20, he enlisted as a sergeant in Company A, 6th Maine Volunteer Infantry Regiment. A year later he was commissioned as an officer in Company B, 20th Maine Volunteer Infantry Regiment. He was promoted several times, ultimately to lieutenant colonel. He mustered out on June 4, 1865.