| Place Name | Southmayd |
| Place Type | City |
| ZIP Code(s) | 75092 75459 76273 |
| County | Grayson County |
| Area Code(s) | 430,903 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 772 |
| Population Growth Rate (2010-19) | -1.41% |
| Majority Ethnicity | White 69.51% |
| Metro/Micro Stats Area | Sherman-Denison, TX |
| US Congressional District(s) | Texas 4th |
| State House Districts | 62 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 69.51% |
| African American | 1.02% |
| Hispanic | 0.11% |
| Asian | 2.95% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 26.41% |