| Swift River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New Hampshire |
| Subdivision Type3: | Region |
| Subdivision Name3: | White Mountains |
| Subdivision Type4: | Towns |
| Length: | 25.6miles |
| Source1: | Kancamagus Pass |
| Source1 Location: | Livermore |
| Source1 Coordinates: | 44.0206°N -71.4919°W |
| Source1 Elevation: | 2780feet |
| Mouth: | Saco River |
| Mouth Location: | Conway |
| Mouth Coordinates: | 43.9836°N -71.1175°W |
| Mouth Elevation: | 435feet |
| Tributaries Left: | Pond Brook, Rob Brook, Douglas Brook, Red Eagle Brook |
| Tributaries Right: | Pine Bend Brook, Sabbaday Brook, Downes Brook, Oliverian Brook, Champney Brook, Pequawket Brook |
The Swift River is a 25.6adj=midNaNadj=mid[1] river in the White Mountains of New Hampshire in the United States. It is a tributary of the Saco River, which flows to the Atlantic Ocean in Maine.
The Swift River rises in the township of Livermore, New Hampshire, on the eastern side of Kancamagus Pass, and flows east into a broad valley, surrounded by mountains, known as the Albany Intervale. Leaving the intervale, the river enters a narrow gorge, passing over two sets of small waterfalls, and continues east through the town of Albany to the Saco River at Conway.
The river is paralleled for its entire length by New Hampshire Route 112, the scenic Kancamagus Highway.