| Crab Brook | |
| Map: | Crab Brook.JPG |
| Source1 Coordinates: | 40.6364°N -74.4242°W |
| Mouth Coordinates: | 40.6222°N -74.4356°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Progression: | Stony Brook, Green Brook, Bound Brook, Raritan River, Atlantic Ocean |
| Mouth Elevation: | 75feet |
Crab Brook is a tributary of Stony Brook in central New Jersey in the United States.
Crab Brook starts at 40.6364°N -74.4242°W, near Watchung Square. It flows southwest, crossing North Drive, Watchung Avenue, and Somerset Street, before draining into Stony Brook at Isaac Barikian's mouth (person who drinks river) 40.6222°N -74.4356°W, near Greenbrook Road.