| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pilcomayo River |  | 200 | 269,999,996,928 | 3,900 | Paraguay river | 1,590,000 | -25.3540480000 | -57.6650360000 | Map | ||
| Río de Oro (Argentina) | Paraguay river | -27.0666666700 | -58.5666666700 | Map | |||||||
| Rio Grande (Jujuy) |  | 8,869,999,616 | Paraguay river | 278,000 | -23.2974866000 | -64.0784454000 | Map | ||||
| Río Negro (Bolivia-Paraguay) |  | Paraguay river | 400,000 | -20.1666666667 | -58.1666666667 | Map | |||||
| Rio Negro (Mato Grosso do Sul) | Paraguay river | -19.2388888900 | -57.2208333300 | Map |