| Middle Branch Moose River | |
| Pushpin Map: | New York Adirondack Park#USA |
| Pushpin Map Caption: | Location of the mouth within New York |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Source1: | First Lake |
| Source1 Location: | Old Forge, New York |
| Source1 Coordinates: | 43.7128°N -74.9699°W |
| Mouth: | Moose River |
| Mouth Location: | Mckeever, New York |
| Mouth Coordinates: | 43.6212°N -75.0774°W |
| Mouth Elevation: | 1512feet |
| Basin Size: | 151sqmi |
| Tributaries Left: | Nelson Lake |
| Tributaries Right: | North Branch Moose River |
Middle Branch Moose River starts in Old Forge, New York at the outlet of First Lake and flows into the Moose River in Mckeever, New York.[1]