| Lewis Brook | |
| Map: | Lewis Brook.JPG |
| Source1 Coordinates: | 40.3292°N -74.7958°W |
| Mouth Coordinates: | 40.3333°N -74.7817°W |
| Subdivision Type1: | Country |
| Mouth Elevation: | 141feet |
| River System: | Raritan River system |
Lewis Brook is a tributary of the Stony Brook in Mercer County, New Jersey in the United States.
Lewis Brook starts at 40.3292°N -74.7958°W,[1] near the Pennington Shopping Center. It flows eastward, crossing North Main Street, before draining into the Stony Brook at 40.3333°N -74.7817°W.[1]