| South Branch Gale 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: | Grafton |
| Subdivision Type4: | Towns |
| Subdivision Name4: | Franconia, Bethlehem |
| Length: | 5.1miles |
| Source1: | Mount Lafayette |
| Source1 Location: | Franconia |
| Source1 Coordinates: | 44.1756°N -71.6483°W |
| Source1 Elevation: | 3640feet |
| Mouth: | Gale River |
| Mouth Location: | Bethlehem |
| Mouth Coordinates: | 44.2436°N -71.6381°W |
| Mouth Elevation: | 1310feet |
| Tributaries Left: | Scarface Brook |
| Tributaries Right: | Burnt Brook, Thompson Brook |
The South Branch of the Gale River is a 5.1adj=midNaNadj=mid[1] river in the White Mountains of New Hampshire in the United States. Via the Gale River, it is a tributary of the Ammonoosuc River and part of the Connecticut River watershed.
The South Branch rises on the north slope of Mount Lafayette in the town of Franconia, New Hampshire, west of Garfield Ridge. It drops rapidly to the north and joins the North Branch to form the Gale River at the crossing of U.S. Route 3. The South Branch provides drinking water for the town of Bethlehem, New Hampshire.