According to the United States Census Bureau, the city has a total area of 3.0square miles (7.8Square kilometers), all of it land. As of the census of 2000, there were 1,704 people, 639 households, and 430families residing in the city. The population density was 571.1people per square mile (220.8Square kilometers).There were 768 housing units at an average density of 257.4per square mile (99.5Square kilometers). Somerville is a city in Burleson County, Texas, United States. The population was 1,704 at the 2000 census. It is part of the Bryan-College Station metropolitan area. Somerville is 90 miles (140km) north of Houston.