| Place Name | Mountainburg |
| Place Type | City |
| ZIP Code(s) | 72946 |
| County | Crawford County |
| Area Code(s) | 479 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 617 |
| Population Growth Rate (2010-19) | -16.32% |
| Majority Ethnicity | White 94.53% |
| Metro/Micro Stats Area | Fort Smith, AR-OK |
| US Congressional District(s) | Arkansas 4th |
| State House Districts | 81 |
| State Senate Districts | 5 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.53% |
| African American | 0% |
| Hispanic | 1.62% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.85% |