| Middle Branch Mad River | |
| Pushpin Map: | New Hampshire#Maine#USA |
| Pushpin Map Size: | 250 px |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | States |
| Subdivision Name2: | New Hampshire, Maine |
| Subdivision Type3: | Counties |
| Subdivision Name3: | Coos, NH, Oxford, ME |
| Subdivision Type4: | Townships |
| Subdivision Name4: | Bean's Purchase, NH, South Oxford, ME |
| Length: | 0.8abbr=onNaNabbr=on |
| Source1: | West Royce Mountain |
| Source1 Location: | Bean's Purchase, NH |
| Source1 Coordinates: | 44.2953°N -71.0208°W |
| Source1 Elevation: | 2340feet |
| Mouth: | Mad River |
| Mouth Location: | South Oxford, ME |
| Mouth Coordinates: | 44.2906°N -71.0067°W |
| Mouth Elevation: | 1130feet |
The Middle Branch of the Mad River is a 0.8adj=midNaNadj=mid mountain brook on the Maine-New Hampshire border in the United States, within the eastern White Mountains.[1] It is a tributary of the Mad River, a short feeder of the Cold River, part of the Saco River watershed.
The Middle Branch flows east off the slopes of West Royce Mountain, beginning in New Hampshire and finishing in Maine. It joins the Mad River just upstream of Mad River Falls near the foot of the mountain.