| Betty Brook | |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Source1 Location: | Delaware County, New York |
| Mouth: | West Branch Delaware River |
| Mouth Location: | Hobart, New York, Delaware County, New York, United States |
| Mouth Coordinates: | 42.3433°N -74.7342°W |
| Basin Size: | 9.04sqmi |
Betty Brook flows into the West Branch Delaware River by Hobart, New York.[1]