| III Corps Observation Group | |
|---|---|
 Aerial photo of a column of American III Corps infantry passing through Dun-sur-Meuse, Lorainne, France, after 11 November 1918, taken by the 90th Aero Squadron | |
| Active | 20 September 1918 – 12 May 1919 |
| Country |  United States |
| Branch | .svg){kind=small} United States Army Air Service |
| Type | Group |
| Role | Command and Control |
| Part of | American Expeditionary Forces (AEF) |
| Engagements |  World War I
 Occupation of the Rhineland |
| Insignia | |
| Identification symbol |  88th Aero Squadron  90th Aero Squadron |
The III Corps Observation Group was a United States Army Air Service unit that fought on the Western Front during World War I as part of the Air Service, First United States Army. It was demobilized on 12 May 1919. There is no modern United States Air Force unit that shares its lineage and history.