Sun Valley is a small city in Lamar County, Texas, United States. The population was 69 at the 2010 census, up from 51 at the 2000 census; in 2020, its population was 70.
Geography
Sun Valley is located in eastern Lamar County east of Paris, the county seat, and west of Detroit. U.S. Route 82 touches the southern part of the Sun Valley city limits. According to the United States Census Bureau, the city has a total area of , all land.
| align = right
| align-fn = center
2020 census
As of the 2020 census, the city had a population of 70 and a median age of 35.0 years. 25.7% of residents were under the age of 18 and 12.9% were 65 years of age or older; for every 100 females there were 118.8 males, and for every 100 females age 18 and over there were 92.6 males age 18 and over.
0.0% of residents lived in urban areas, while 100.0% lived in rural areas.
There were 34 households in the city, of which 41.2% had children under the age of 18 living in them. Of all households, 41.2% were married-couple households, 14.7% were households with a male householder and no spouse or partner present, and 38.2% were households with a female householder and no spouse or partner present. About 32.3% of all households were made up of individuals and 14.7% had someone living alone who was 65 years of age or older.
! Race !! Number !! Percent
|-
| White || 43 || 61.4%
|-
| Black or African American || 1 || 1.4%
|-
| American Indian and Alaska Native || 0 || 0.0%
|-
| Asian || 0 || 0.0%
|-
| Native Hawaiian and Other Pacific Islander || 0 || 0.0%
|-
| Some other race || 14 || 20.0%
|-
| Two or more races || 12 || 17.1%
|-
| Hispanic or Latino (of any race) || 23 || 32.9%
|}
2000 census
As of the census of 2000, there were 51 people, 18 households, and 14 families residing in the city.
The Texas Education Code specifies that all of Lamar County is in the service area of Paris Junior College.