| Unit Name: | No. 21 Squadron RSAF |
| Dates: | Unknown-present |
| Country: | Saudi Arabia |
| Branch: | Royal Saudi Air Force |
| Type: | Squadron |
| Garrison: | King Faisal Air Base |
| Garrison Label: | Base |
| Equipment: | BAE Systems Hawk 165 |
| Equipment Label: | Aircraft |
| Identification Symbol Label: | Squadron Badge heraldry |
No. 21 Squadron RSAF is a squadron of the Royal Saudi Air Force that operates the BAE Systems Hawk 165 at King Faisal Air Base, Tabuk, Tabuk Province in Saudi Arabia within RSAF 7 Wing.[1]