| McMullen Brook | |
| Pushpin Map: | New York Adirondack Park#USA |
| Pushpin Map Caption: | Location of the mouth of McMullen Brook |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Mouth: | Mohawk River |
| Mouth Location: | Beartown, New York |
| Mouth Coordinates: | 43.3675°N -75.4339°W[1] |
| Mouth Elevation: | 801feet |
| Basin Size: | 1.58sqmi |
McMullen Brook flows into the Mohawk River northeast of Beartown, New York.[2]