| Hampton Falls River | |
| Pushpin Map: | New Hampshire#USA |
| Pushpin Map Size: | 250 px |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New Hampshire |
| Subdivision Type3: | County |
| Subdivision Name3: | Rockingham |
| Subdivision Type4: | Towns |
| Subdivision Name4: | Kensington, Seabrook, Hampton Falls |
| Length: | 5.6miles |
| Source1 Location: | Kensington |
| Source1 Coordinates: | 42.9036°N -70.9281°W |
| Source1 Elevation: | 110feet |
| Mouth: | Hampton River |
| Mouth Location: | Hampton Falls |
| Mouth Coordinates: | 42.9131°N -70.8456°W |
| Mouth Elevation: | 0feet |
| Tributaries Left: | Winkley Brook |
| Tributaries Right: | Gove Brook |
The Hampton Falls River is a 5.6adj=midNaNadj=mid[1] river in southeastern New Hampshire in the United States. Its lower reaches are tidal, as part of the Hampton salt marsh close to the Atlantic Ocean.
The river rises in the southeast corner of Kensington and travels east into Seabrook. The river approximately follows the boundary between Seabrook and Hampton Falls, crossing it three times. It passes Weares Mill and eventually heads northeast into Hampton Falls. Approaching the town center, it passes through the chain of three Dodge Ponds, dropping 10feet over the "Hampton Falls" before entering the final one. Crossing under U.S. Route 1, the river enters the Hampton salt marsh, where it ends at the Hampton River.