| Place Name | Mountainburg Township |
| Place Type | Township |
| ZIP Code(s) | 72934 72946 72952 |
| County | Crawford County |
| Area Code(s) | 479 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 1,770 |
| Majority Ethnicity | White 95.12% |
| Metro/Micro Stats Area | Fort Smith, AR-OK |
| US Congressional District(s) | Arkansas 4th |
| State House Districts | 75,81 |
| State Senate Districts | 5 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.12% |
| African American | 0% |
| Hispanic | 0.46% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.42% |