| Place Name | Sienna |
| Place Type | Census Designated Place |
| ZIP Code(s) | 77459 77583 |
| County | Fort Bend County |
| Area Code(s) | 281,346,713,832 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 21,776 |
| Majority Ethnicity | White 61.51% |
| Metro/Micro Stats Area | Houston-The Woodlands-Sugar Land, TX |
| US Congressional District(s) | Texas 22nd |
| State House Districts | 27 |
| State Senate Districts | 17 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 61.51% |
| African American | 17.09% |
| Hispanic | 0.57% |
| Asian | 9.33% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 11.5% |