Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Somerville is a town in Barton Township, Gibson County, Indiana, United States. The population was 312 at the 2000 census. As of the census of 2000, there were 312 people, 124 households, and 81 families residing in the town. The population density was 1,061.5 people per square mile (415.4/km²). There were 132 housing units at an average density of 449.1/sq mi (175.7/km²). The racial makeup of the town was 99.04% White, 0.64% African American, 0.32% from other races. Hispanic or Latino of any race were 0.32% of the population.