| Pilar | |
| Native Name: | Partido del Pilar |
| Settlement Type: | Department |
| Coordinates: | -34.4667°N -113°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | 1864 |
| Founder: | Juan de Garay |
| Seat Type: | Seat |
| Seat: | Pilar |
| Leader Party: | PRO |
| Leader Title: | Mayor |
| Leader Name: | Nicolas Ducoté |
| Unit Pref: | Metric |
| Area Total Km2: | 352 |
| Population Total: | 232463 |
| Population Density Km2: | auto |
| Population Demonym: | pilarense |
| Postal Code Type: | Postal Code |
| Postal Code: | B1629 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE096 |
| Area Code Type: | Area Code |
| Area Code: | 02322 |
| Blank Name Sec1: | Patron saint |
| Blank Info Sec1: | Virgen del Pilar |
Pilar Partido is a partido in the northern part of Greater Buenos Aires in Buenos Aires Province, Argentina.
The provincial subdivision has a population of about 232,000 inhabitants in an area of 352sqkm, and its capital city is Pilar, which is around 45km (28miles) from Buenos Aires.
It has universities and schools.