| Roarback Brook | |
| Pushpin Map: | New York Adirondack Park#USA |
| Pushpin Map Caption: | Location of the mouth of Roarback Brook |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Subdivision Type3: | Region |
| Subdivision Name3: | Greene County |
| Source1 Coordinates: | 42.2439°N -74.4303°W |
| Mouth: | West Kill |
| Mouth Location: | WSW of Lexington, New York, United States |
| Mouth Coordinates: | 42.235°N -74.3892°W[1] |
| Mouth Elevation: | 1362feet |
Roarback Brook begins on the eastern side of Vly Mountain and travels east, passing to the south of Vinegar Hill before converging with West Kill west-southwest of Lexington, New York.