| Unit Name: | 21 Electronic Warfare Regiment |
| Country: | Canada |
| Branch: | Canadian Army |
| Role: | Electronic warfare |
| Command Structure: | 6 Canadian Combat Support Brigade |
| Garrison: | CFB Kingston, Ontario |
| Commander1 Label: | Commanding officer |
| Commander1: | Lieutenant-Colonel Ricardo F.J. Dias |
| Commander2 Label: | Regimental sergeant major |
| Commander2: | Chief Warrant Officer Bruce W.C. Mercer |
| Motto: | la|Inveni et usurpa|find and exploit |
21 Electronic Warfare Regiment (French: 21<sup>e</sup> Régiment de guerre électronique) is a Communications and Electronics Branch regiment in the Canadian Army, based at CFB Kingston, Ontario.[1] 21 EW Regt exists to provide trained army electronic warfare operators and support personnel to the Canadian Armed Forces. 214 Electronic Warfare Squadron is the only Reserve electronic warfare squadron within the Canadian Armed Forces that is a part of a Regular Force regiment. Many of its members serve in various UN and NATO peacekeeping missions around the world.
The regiment includes:
21 Electronic Warfare Regiment primarily employs the following occupations in the Canadian Army, among others: