| Tandil | |
| Native Name: | Partido de Tandil |
| Settlement Type: | Department |
| Image Blank Emblem: | Logo Municipio de Tandil.png |
| Blank Emblem Size: | 150 |
| Coordinates: | -37.0667°N -67°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | April 4, 1823 |
| Founder: | Martin Rodriguez |
| Seat Type: | Seat |
| Seat: | Tandil |
| Leader Party: | UCR-JxC |
| Leader Title: | Mayor |
| Leader Name: | Miguel Ángel Lunghi |
| Unit Pref: | Metric |
| Area Total Km2: | 4935 |
| Population Total: | 108109 |
| Population Density Km2: | auto |
| Population Demonym: | tandilense |
| Postal Code Type: | Postal Code |
| Postal Code: | B2740 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE121 |
| Area Code Type: | Area Code |
| Area Code: | 02478 |
| Blank Name Sec1: | Patron saint |
| Blank Info Sec1: | ? |
Tandil Partido is a partido (Administrative territorial entity of Buenos Aires Province, Argentina) of Buenos Aires Province in Argentina.
The provincial subdivision has a population of about 108,000 inhabitants in an area of 4935sqkm, and its capital city is Tandil, which is around 350km (220miles) from Buenos Aires.