| Place Name | Buchanan Dam |
| Place Type | Census Designated Place |
| ZIP Code(s) | 78609 |
| County | Llano County |
| Area Code(s) | 512,737,325 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 1,136 |
| Population Growth Rate (2010-19) | -0.72% |
| Majority Ethnicity | White 88.6% |
| US Congressional District(s) | Texas 11th |
| State House Districts | 53 |
| State Senate Districts | 24 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 88.6% |
| African American | 0% |
| Hispanic | 0.78% |
| Asian | 0.5% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 10.13% |