| Place Name | Winthrop |
| Place Type | City |
| ZIP Code(s) | 71866 |
| County | Little River County |
| Area Code(s) | 327,870 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 141 |
| Population Growth Rate (2010-19) | -39.58% |
| Majority Ethnicity | White 96.9% |
| Metro/Micro Stats Area | Texarkana, TX-AR |
| US Congressional District(s) | Arkansas 4th |
| State House Districts | 4 |
| State Senate Districts | 11 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.9% |
| African American | 0% |
| Hispanic | 3.1% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |