| Rivadavia | |
| Native Name: | Partido de Rivadavia |
| Settlement Type: | Partido |
| Coordinates: | -35.4833°N -121°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Subdivision Type1: | Province |
| Subdivision Name1: | Buenos Aires |
| Established Title: | Established |
| Established Date: | September 30, 1910 |
| Founder: | provincial law 3273 |
| Seat Type: | Seat |
| Seat: | América |
| Leader Party: | Juntos por el Cambio |
| Leader Title: | Mayor |
| Leader Name: | Javier Reynoso |
| Unit Pref: | Metric |
| Area Total Km2: | 3940 |
| Population Total: | 15452 |
| Population Density Km2: | auto |
| Population Demonym: | rivadaviense |
| Postal Code Type: | Postal Code |
| Postal Code: | B6237 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE104 |
| Area Code Type: | Area Code |
| Area Code: | 2337 |
| Website: | munirivadavia.gov.ar |
Rivadavia is a partido in the northwest of Buenos Aires Province, Argentina, on the border with La Pampa Province. It has an area of 3940sqkm, and a population of 15,452 .
The partido, created in 1910, has the town of América as its capital, and its main economic activities are cattle, and the cultivation of wheat, maize and soya beans.
The partido is named in honour of Bernardino Rivadavia, a veteran of the Argentine War of Independence and President of Argentina 1826–1827.