| Arthur Barrett Donnelly | |
| Birth Date: | 31 May 1875 |
| Birth Place: | St. Louis, Missouri |
| Death Place: | Blue Ridge Summit, Pennsylvania |
| Placeofburial: | Calvary Cemetery and Mausoleum, St. Louis, Missouri |
| Allegiance: |  United States |
| Branch: | United States Army |
| Serviceyears: | 1892–1919 |
| Rank: | Brigadier general |
| Unit: | Missouri National Guard |
| Commands: | Company F, 1st Missouri Infantry Regiment 1st Missouri Infantry Regiment Missouri National Guard 69th Infantry Brigade |
| Battles: | Spanish–American War Pancho Villa Expedition World War I |
| Spouse: | Anna Pike Renick |
| Children: | 3 |
| Laterwork: | Manufacturing company owner and operator |
Arthur Barrett Donnelly (May 31, 1875 – July 29, 1919) was a United States Army officer in the late 19th and early 20th centuries.
Donnelly was born in St. Louis on May 31, 1875. On December 7, 1892, he enlisted in the 1st Missouri Infantry Regiment. By the Spanish–American War, Donnelly commanded his company, and by the time he participated in the Pancho Villa Expedition in 1916, he commanded his regiment. On January 8, 1917, he was promoted to Adjutant General of the Missouri National Guard, holding the rank of brigadier general. On March 25, 1917, Missouri's governor gave Donnelly an indefinite leave of absence to assume command of the 1st Missouri Infantry. After his appointment as a brigadier general on August 5, 1917, he commanded the 69th Infantry Brigade at what is now Fort Sill.
In addition to his service in the military, Donnelly worked at the Hamilton-Brown Shoe Company from 1901 to 1906 as a factory department manager, and from 1906 to 1908 as an assistant factory superintendent and buyer. He later served as president of the leather goods producer Arthur B. Donnelly and Company, as well as the Interstate Mercantile Company and Missouri Paint Varnish Company.
In April 1918, Donnelly was accused of Conduct unbecoming an officer for drinking, gambling, and allowing officers under his command to do so. Rather than face court-martial, he resigned his brigadier general's appointment and applied for a commission at a lower rank. Donnelly was commissioned as a major and assigned to duty with the 11th Infantry Division's 71st Infantry Regiment at Fort George G. Meade, Maryland.[1]
While conducting a post-war East Coast sightseeing tour, Donnelly was killed in an automobile accident near Blue Ridge Summit, Pennsylvania on July 29, 1919. The crash injured his wife, daughter, two sons and other passengers.[1] Donnelly was interred at Calvary Cemetery and Mausoleum in St. Louis.
Donnelly married Anna Pike Renick on May 10, 1898. He was a member of the Catholic Church as well as a Republican.