| Place Name | Sullivan City |
| Place Type | City |
| ZIP Code(s) | 78595 |
| County | Hidalgo County |
| Area Code(s) | 956 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 4,026 |
| Population Growth Rate (2010-19) | -2.35% |
| Majority Ethnicity | Hispanic 0% |
| Metro/Micro Stats Area | McAllen-Edinburg-Mission, TX |
| US Congressional District(s) | Texas 28th |
| State House Districts | 35 |
| State Senate Districts | 20 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 41.35% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 58.65% |