Captain William Parkinson Wright (b. 1846, Illinois; d. 1933, Pennsylvania) was a veteran of the American Civil War. He was an officer in the 156th Illinois Volunteer Infantry during the war. He was the 25th Commander-in-Chief, Military Order of the Loyal Legion of the United States (MOLLUS) (1931-1933) and the 66th Commander-in-Chief, Grand Army of the Republic (1932-1933). Wright was the last Commander-in-Chief of the MOLLUS who was a veteran of the Civil War.