4th Princess Louise Dragoon Guards
| 4th Princess Louise Dragoon Guards | |
|---|---|
| Badge of the 4th Princess Louise Dragoon Guards | |
| Active | 1875–1965 | 
| Country | Canada | 
| Branch | Canadian Militia (1875–1940) Canadian Army (1940–1965) | 
| Type | Dragoon Guards | 
| Role | Cavalry, reconnaissance | 
| Size | One Regiment | 
| Part of | 
 | 
| Headquarters | Ottawa, Ontario | 
| Patron | Princess Louise, Duchess of Argyll | 
| Motto(s) | Pro aris et focis (Latin for 'For our altars and for our homes') | 
| Colors | Blue tunics with white facings | 
| March | 
 | 
| Engagements | |
| Battle honours | 
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| Commanders | |
| Notable commanders | Harry Wickwire Foster | 
The 4th Princess Louise Dragoon Guards is an inactive armoured regiment of the Canadian Militia / Canadian Army. It is currently on the Supplementary Order of Battle.