| Place Name | Frelinghuysen Township |
| Place Type | Township |
| ZIP Code(s) | 07821 07825 07838 07860 |
| County | Warren County |
| Area Code(s) | 908 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 2,144 |
| Majority Ethnicity | White 91.97% |
| Metro/Micro Stats Area | Allentown-Bethlehem-Easton, PA-NJ |
| US Congressional District(s) | New Jersey 5th |
| State Assembly Districts | 24 |
| State Senate Districts | 24 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 91.97% |
| African American | 1.57% |
| Hispanic | 0% |
| Asian | 0.49% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.97% |