| Mar Chiquita | |
| Native Name: | Partido de Mar Chiquita |
| Settlement Type: | Department |
| Image Blank Emblem: | Mar chiquita partido textlogo.png |
| Blank Emblem Size: | 200 |
| Coordinates: | -34.6667°N -85°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | December 25, 1839 |
| Founder: | Juan Manuel de Rosas |
| Seat Type: | Seat |
| Seat: | Coronel Vidal |
| Leader Party: | UCR |
| Leader Title: | Mayor |
| Leader Name: | Carlos Alberto Ronda |
| Unit Pref: | Metric |
| Area Total Km2: | 3114 |
| Population Total: | 17908 |
| Population Density Km2: | auto |
| Population Demonym: | marchiquitense |
| Postal Code Type: | Postal Code |
| Postal Code: | B7174 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE079 |
| Area Code Type: | Area Code |
| Area Code: | 02265 |
Mar Chiquita Partido is a county (partido) located on the Atlantic coast of Buenos Aires Province in Argentina.
This provincial subdivision has a population of about 18,000 inhabitants in an area of 31140NaN0 and its county seat is Coronel Vidal.
The economy of Mar Chiquita Partido is dominated by agriculture, cattle raising, and the summer tourist season (December-February).