| Argentine Sea | |
|---|---|
  Argentine Sea | |
 The Argentine Sea, off the Atlantic coast of Argentina | |
| Location | Eastern shore of Argentina |
| Coordinates | 46°S 63°W / 46°S 63°W |
| Part of | South Atlantic Ocean |
| River sources | Río de la Plata, Colorado River, Río Negro, Chubut River, Deseado River |
| Basin countries | Argentina, Uruguay, Falkland Islands (UK) |
| Surface area | 1,000,000 square kilometres (390,000 sq mi) |
| Islands | Falkland Islands, Tierra del Fuego |
The Argentine Sea (Spanish: Mar Argentino) is a marginal sea of the Atlantic Ocean adjacent to the southern tip of South America. It ranges from the mouth of the estuary of the Río de la Plata in the north (35th parallel south) to the Isla de los Estados in the south, and from the Argentine coast to the 200 meters isobath. Its width varies between 210 km in front of Mar del Plata and 850 km at the latitude of the Falkland Islands. The coastline extends for 4,725 km. To the east of the Argentine Sea extends much deeper and more extensive Argentine Basin.