| Cook Brook | |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Source1 Location: | Sullivan County, New York |
| Mouth: | Beaver Kill |
| Mouth Location: | Cooks Falls, New York, Delaware County, New York, United States |
| Mouth Coordinates: | 41.9464°N -74.9783°W |
| Basin Size: | 4.51sqmi |
Cook Brook flows into Beaver Kill by Cooks Falls, New York.[1]