Somerville is a city in Burleson County, Texas, United States. The population was 1,312 at the 2020 census. Somerville is named for Al…Somerville is a city in Burleson County, Texas, United States. The population was 1,312 at the 2020 census. Somerville is named for Albert Somerville the first president of the Gulf, Colorado and Santa Fe Railway.