| San Cayetano | |
| Native Name: | Partido de San Cayetano |
| Settlement Type: | Department |
| Coordinates: | -38.3667°N -76°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Established Title: | Established |
| Established Date: | October 24, 1954 |
| Founder: | provincial law 5921 |
| Seat Type: | Seat |
| Seat: | San Cayetano |
| Leader Party: | UCR |
| Leader Title: | Mayor |
| Leader Name: | Miguel Ángel Gargaglione |
| Unit Pref: | Metric |
| Area Total Km2: | 2757.5 |
| Population Total: | 8399 |
| Population Density Km2: | auto |
| Population Demonym: | cayenatense |
| Postal Code Type: | Postal Code |
| Postal Code: | B7521 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE113 |
| Area Code Type: | Area Code |
| Area Code: | 02983 |
| Blank Name Sec1: | Patron saint |
| Blank Info Sec1: | ? |
San Cayetano Partido is a partido of Buenos Aires Province in Argentina.
The provincial subdivision has a population of about 8,399 inhabitants in an area of 2757.5sqkm. Its capital city is San Cayetano, which is around 628km (390miles) from Buenos Aires.
The partido and its cabecera (capital) are named after San Cayetano, a Catholic Saint (1480-1547). In Argentina, he is known as patrón del trabajo, translated as the patron saint of work in English.