| Betty Brook | |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Mouth: | West Kill |
| Mouth Location: | North Blenheim, New York, United States |
| Mouth Coordinates: | 42.4875°N -74.5111°W |
| Basin Size Mi2: | 8.44 |
Betty Brook converges with West Kill by North Blenheim, New York.[1]