| Ensenada | |
| Native Name: | Partido de Ensenada |
| Settlement Type: | Department |
| Coordinates: | -34.8667°N -111°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Seat Type: | Seat |
| Seat: | Ensenada |
| Leader Party: | Broad Front |
| Leader Title: | Mayor |
| Leader Name: | Mario Carlos Secco |
| Unit Pref: | Metric |
| Area Total Km2: | 135 |
| Population Total: | 51448 |
| Population Density Km2: | auto |
| Population Demonym: | ensenadense |
| Postal Code Type: | Postal Code |
| Postal Code: | B1925 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE035 |
| Area Code Type: | Area Code |
| Area Code: | 02221 |
Ensenada Partido (pronounced as /es/) is a district (a "partido") of Buenos Aires Province, Argentina, belonging to the Greater La Plata area, just south of the Gran Buenos Aires urban conglomerate.
The provincial district has a population of about 51,448 inhabitants in an area of only 1350NaN0; its capital city is Ensenada, 270NaN0 from Buenos Aires and from La Plata.
The district spans the area historically known as Ensenada de Barragán (Barragán's Cove). The old coastal site forms part of what is today Santiago Island. A military battery and defensive wall was built there in the early 18th century, known as Fuerte Barragán (Fort Barragán). On 5 May 1801 Viceroy Marqués de Avilés founded the village of Ensenada. In 1882, the government of Dardo Rocha declared it as temporary provincial capital while the new city of La Plata was being built.