Texas State Highway 36 passes through the city, leading northwest 17 miles (27 km) to Caldwell, the county seat, and southeast 15 miles (24 km) to Brenham.
According to the United States Census Bureau, Somerville has a total area of 3.0 square miles (7.7 km2), of which 0.02 square miles (0.05 km2), or 0.60%, is water.[4]
As of the 2020 United States census, there were 1,312 people, 438 households, and 284 families residing in the city.
As of the census[2] of 2000, there were 1,704 people, 639 households, and 430 families residing in the city. The population density was 571.1 inhabitants per square mile (220.5/km2). There were 768 housing units at an average density of 257.4 per square mile (99.4/km2). The racial makeup of the city was 54.17% White, 30.52% African American, 1.06% Native American, 0.12% Asian, 11.80% from other races, and 2.35% from two or more races. Hispanic or Latino of any race were 21.48% of the population.
There were 639 households, out of which 31.6% had children under the age of 18 living with them, 43.8% were married couples living together, 18.6% had a female householder with no husband present, and 32.6% were non-families. 28.6% of all households were made up of individuals, and 14.6% had someone living alone who was 65 years of age or older. The average household size was 2.67 and the average family size was 3.32.
In the city, the population was spread out, with 30.9% under the age of 18, 9.2% from 18 to 24, 24.9% from 25 to 44, 20.0% from 45 to 64, and 15.0% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 94.1 males. For every 100 females age 18 and over, there were 87.3 males.
The median income for a household in the city was $26,208, and the median income for a family was $34,844. Males had a median income of $25,679 versus $17,379 for females. The per capita income for the city was $12,995. About 18.3% of families and 24.0% of the population were below the poverty line, including 34.5% of those under age 18 and 15.8% of those age 65 or over.
^Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.[8][9]
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