| Official Name: | Guaminí |
| Pushpin Map: | Argentina |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Argentina |
| Pushpin Mapsize: | 200 |
| Pushpin Mapsize1: | 200 |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Buenos Aires |
| Subdivision Type2: | Partido |
| Subdivision Name2: | Guaminí |
| Established Title: | Founded |
| Established Date: | March 28, 1883 (formal) |
| Population Total: | 2,704 |
| Coordinates: | -37.0167°N -87°W |
| Elevation M: | 95 |
| Postal Code Type: | CPA Base |
| Postal Code: | B 6432 |
| Area Code: | +54 2929 |
Guaminí is the capital of Guaminí Partido in Buenos Aires Province, Argentina.
The area was first occupied by Europeans during the Conquest of the Desert. The first settlement in the location was founded on March 30, 1876, and called Santa María de Guaminí. On March 28, 1883, the settlement was officially founded with the name Guaminí.