| Place Name | Montclair |
| Place Type | Census Designated Place |
| ZIP Code(s) | 22025 22191 22193 |
| County | Prince William County |
| Area Code(s) | 571,703 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 19,877 |
| Population Growth Rate (2010-19) | 13.84% |
| Majority Ethnicity | White 58.69% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Virginia 1st |
| House of Delegates Districts | 31,52 |
| State Senate Districts | 36 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 58.69% |
| African American | 21.45% |
| Hispanic | 0.6% |
| Asian | 7.12% |
| Native American | 0.14% |
| Hawaiin/Pacific Islander | 11.99% |