| Place Name | Glen Gardner |
| Place Type | Borough |
| ZIP Code(s) | 08826 |
| County | Hunterdon County |
| Area Code(s) | 908 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 1,729 |
| Population Growth Rate (2010-19) | -1.29% |
| Majority Ethnicity | White 79.88% |
| Metro/Micro Stats Area | New York-Newark-Jersey City, NY-NJ-PA |
| US Congressional District(s) | New Jersey 7th |
| State Assembly Districts | 23 |
| State Senate Districts | 23 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 79.88% |
| African American | 0.6% |
| Hispanic | 0.12% |
| Asian | 0.6% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 18.8% |