| 21st Cavalry Division | |
|---|---|
&sq=Qlik&lang=&file=File:21st_cav_div.svg) Shoulder Sleeve Insignia | |
| Active | 1921–1940 |
| Country | United States |
| Branch | Army National Guard |
| Type | Cavalry Division |
| U.S. Cavalry Divisions | ||||
|
The 21st Cavalry Division was a United States Army division with units located primarily in the northeastern United States. The division was created from the perceived need for additional cavalry units after the First World War. It numbered in succession of the Regular Army divisions, which were not all active at its creation.