| Humid Chaco | |
|---|---|
 Near Resistencia, Chaco, Northeastern Argentina | |
 | |
| Ecology | |
| Realm | Neotropical |
| Biome | tropical and subtropical grasslands, savannas, and shrublands |
| Borders | |
| Geography | |
| Area | 291,596 km2 (112,586 sq mi) |
| Countries | |
| Conservation | |
| Protected | 35,949 km² (12%)[1] |
The Humid Chaco (Spanish: Chaco Húmedo or Chaco Oriental) is tropical grasslands, savannas, and shrublands ecoregion in South America. It lies in the basin of the Paraná River, covering portions of central Paraguay and northern Argentina, and with a small portion of southwestern Brazil and northwestern Uruguay. The natural vegetation is a mosaic of grasslands, palm savanna, and forest.