Somerville is a census-designated place (CDP) and former village in Milford Township, Butler County, Ohio, United States.

According to the United States Census Bureau, the village had a total area of 0.25 square miles (0.65 km2), all land.

On March 15, 2016, Somerville residents voted 52% to 48% to dissolve the village into Milford Township, after its entire council faced term limits or resigned.

19.8% of all households were made up of individuals, and 4.1% had someone living alone who was 65 years of age or older.

16.0% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older.

About 5.9% of families and 10.3% of the population were below the poverty line, including 10.2% of those under the age of eighteen and 5.3% of those 65 or over.