| Settlement Type: | Town |
| Official Name: | Piñeiro |
| Pushpin Map: | Argentina Buenos Aires Province#Argentina |
| Pushpin Map Caption: | Location in Buenos Aires province |
| Pushpin Mapsize: | 240 |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Partido |
| Subdivision Name2: | Avellaneda |
| Established Title: | Founded |
| Established Date: | 19 April 1893 |
| Population Total: | 26979 |
| Population Density Km2: | auto |
| Coordinates: | -34.6697°N -58.3886°W |
| Elevation M: | 32 |
| Postal Code Type: | CPA Base |
| Postal Code: | B 1870 |
| Area Code: | +54 11 |
Piñeiro is a town in Avellaneda Partido of Buenos Aires Province, Argentina.[1] It forms part of the urban agglomeration of Greater Buenos Aires.