| Official Name: | Buchanan Dam, Texas |
| Settlement Type: | Census-designated place |
| Mapsize: | 250px |
| Image Map1: | Llano County BuchananDam.svg |
| Mapsize1: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Texas |
| Subdivision Type2: | County |
| Subdivision Name2: | Llano |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 52.38 |
| Area Land Km2: | 20.06 |
| Area Water Km2: | 32.32 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 1508 |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 321 |
| Coordinates: | 30.7644°N -98.4542°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 78609 |
| Area Code: | 512 |
| Blank Name: | FIPS code |
| Blank Info: | 48-10984[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1353114 |
Buchanan Dam is a census-designated place (CDP) in Llano County, Texas, United States. The population was 1,519 at the 2010 census,[2] down from 1,688 at the 2000 census.
Buchanan Dam is located in northeastern Llano County at 30.7645°N -98.4542°W (30.764459, -98.454175),[4] on the west and south shores of Lake Buchanan, a reservoir on the Colorado River. The CDP also occupies the south and west shores of Inks Lake, on the Colorado directly downstream from Lake Buchanan. It extends north along Lake Buchanan as far as Bluffton.
Texas State Highway 29 passes through the southern part of the CDP, crossing the Colorado River just south of the Buchanan Dam. Highway 29 leads east to Burnet and west to Llano. State Highway 261 leads north from Highway 29 up the west side of Lake Buchanan 8miles to Bluffton.
According to the United States Census Bureau, the Buchanan Dam CDP has a total area of 52.4km2, of which 20.1km2 are land and 32.3km2, or 61.70%, are water.[1]
| White (NH) | 1,310 | 86.87% | |
| Black or African American (NH) | 4 | 0.27% | |
| Native American or Alaska Native (NH) | 4 | 0.27% | |
| Asian (NH) | 12 | 0.8% | |
| Some Other Race (NH) | 1 | 0.07% | |
| Mixed/Multi-Racial (NH) | 64 | 4.24% | |
| Hispanic or Latino | 113 | 7.49% | |
| Total | 1,508 |
As of the census of 2000, there were 1,688 people, 848 households, and 545 families residing in the CDP. The population density was 221.7sp=usNaNsp=us. There were 1,294 housing units at an average density of 170sp=usNaNsp=us. The racial makeup of the CDP was 97.16% White, 0.36% African American, 0.06% Native American, 0.06% Asian, 1.48% from other races, and 0.89% from two or more races. Hispanics or Latinos of any race were 5.33% of the population.
Of the 848 households, 11.0% had children under the age of 18 living with them, 57.1% were married couples living together, 4.5% had a female householder with no husband present, and 35.7% were not families. About 31.4% of all households were made up of individuals, and 13.8% had someone living alone who was 65 years of age or older. The average household size was 1.99 and the average family size was 2.43.
In the CDP, the population was distributed as 11.9% under the age of 18, 3.7% from 18 to 24, 16.4% from 25 to 44, 35.0% from 45 to 64, and 32.9% who were 65 years of age or older. The median age was 56 years. For every 100 females, there were 98.6 males. For every 100 females age 18 and over, there were 101.5 males.
The median income for a household in the CDP was $32,586, and for a family was $41,216. Males had a median income of $39,286 versus $23,580 for females. The per capita income for the CDP was $25,812. About 5.7% of families and 8.5% of the population were below the poverty line, including 16.5% of those under age 18 and 2.0% of those age 65 or over.
Buchanan Dam is served by the Burnet Consolidated Independent School District.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Buchanan Dam has a humid subtropical climate, abbreviated "Cfa" on climate maps.[6]