| Official Name: | Ruiz de Montoya |
| Settlement Type: | Municipality and village |
| Pushpin Map: | Argentina Misiones Province#Argentina |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location of Ruiz de Montoya |
| Subdivision Type: | Country |
| Subdivision Name: |  Argentina |
| Subdivision Name1: | Misiones Province |
| Subdivision Type2: | Department |
| Unit Pref: | Imperial |
| Area Total Km2: | 130 |
| Population As Of: | 2001 |
| Population Total: | 3374 |
| Population Density Km2: | auto |
| Timezone: | ART |
| Utc Offset: | -3 |
| Coordinates: | -26.9686°N -55.0575°W |
Ruiz de Montoya is a village and municipality in Misiones Province in north-eastern Argentina.[1]
The municipality contains part of the Valle del Arroyo Cuña-Pirú Reserve, created in 2000.