| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Hvítá (Árnessýsla) |  | 1,644,000,000 | 440 | Hvítárvatn | Ölfusá | 185,000 | 64.6166666667 | -19.8333333333 | Map | ||
| Sog (river) |  | 110 | 1,000,000,000 | Þingvallavatn | Ölfusá | 21,900 | 64.0887361111 | -21.0083194444 | Map |