The citizens of Somerville are slightly less educated than the national average of 21.84% for the average city or town: 14.31% of adults in Somerville have a bachelor's degree or advanced degree The per capita income in Somerville in 2010 was $20,626, which is middle income relative to Texas, and lower middle income relative to the rest of the US. This equates to an annual income of $82,504 for a family of four.