| San Pedro | |
| Native Name: | Partido de San Pedro |
| Settlement Type: | Department |
| Coordinates: | -33.6667°N -99°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | December 30, 1784 |
| Founder: | ? |
| Seat Type: | Seat |
| Seat: | San Pedro |
| Leader Party: | Fe Party |
| Leader Title: | Mayor |
| Leader Name: | Cecilio Salazar |
| Unit Pref: | Metric |
| Area Total Km2: | 1322 |
| Population Total: | 55234 |
| Population Density Km2: | auto |
| Population Demonym: | sanpedrina/o |
| Postal Code Type: | Postal Code |
| Postal Code: | B2930 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE118 |
| Area Code Type: | Area Code |
| Area Code: | o3329 |
| Blank Name Sec1: | Patron saint |
| Blank Info Sec1: | San Pedro |
San Pedro Partido is a partido located in the north of the Argentine province of Buenos Aires. Its capital city is San Pedro. With an area of, the county population was 55,234 .
The economy of San Pedro Partido is dominated by farming, and the main agricultural products include wheat, soybean and fruit.
Other sources of revenue include factories, service industries and ecotourism.