San Augustine is the county seat city of San Augustine County, Texas, in East Texas, United States. The population was 2,108 at the 2010 census.
San Augustine is located at 31°31′52″N 94°06′39″W / 31.531086°N 94.110971°W / 31.531086; -94.110971 (31.531086, −94.110971).
According to the United States Census Bureau, the city has a total area of 4.8 square miles (12 km), of which 4.7 square miles (12 km) is land and 0.1 square miles (0.26 km) (2.08%) is water.
As of the census of 2000, there were 2,475 people, 859 households, and 573 families residing in the city. The population density was 525.2 people per square mile (202.9/km). There were 1,076 housing units at an average density of 228.3/sq mi (88.2/km). The racial makeup of the city was 37.82% White, 57.94% African American, 0.08% Native American, 0.69% Asian, 3.07% from other races, and 0.40% from two or more races. Hispanic or Latino of any race were 5.13% of the population.
There were 859 households out of which 29.8% had children under the age of 18 living with them, 37.3% were married couples living together, 26.0% had a female householder with no husband present, and 33.2% were non-families. 30.5% of all households were made up of individuals and 17.0% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.23.
In the city, the population was spread out with 26.9% under the age of 18, 8.1% from 18 to 24, 22.6% from 25 to 44, 19.7% from 45 to 64, and 22.7% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 80.4 males. For every 100 females age 18 and over, there were 67.6 males.
The median income for a household in the city was $25,489, and the median income for a family was $33,203. Males had a median income of $23,750 versus $17,628 for females. The per capita income for the city was $14,918. About 19.1% of families and 24.7% of the population were below the poverty line, including 35.0% of those under age 18 and 30.7% of those age 65 or over.