| Buenos Aires | |
| Settlement Type: | Municipality |
| Pushpin Map: | Nicaragua |
| Pushpin Label Position: | left |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in Nicaragua |
| Subdivision Type: | Country |
| Subdivision Name: |  Nicaragua |
| Subdivision Type1: | Department |
| Subdivision Name1: | Rivas Department |
| Unit Pref: | Imperial |
| Area Total Km2: | 75 |
| Population As Of: | 2005 |
| Population Total: | 5420 |
| Population Urban: | 2236 |
| Coordinates: | 11.4667°N -134°W |
Buenos Aires is a municipality in the Rivas department of Nicaragua, located on the western shore of Lake Nicaragua.