Groveville is an unincorporated community and census-designated place (CDP)[9] located within Hamilton Township, in Mercer County, in the U.S. state of New Jersey.

The New Jersey Turnpike (Interstate 95) crosses the eastern part of the CDP between Exits 7 and 7A, with no direct access.

The 2010 United States census counted 2,945 people, 1,046 households, and 810 families in the CDP.

There were 1,093 housing units at an average density of 514.9 per square mile (198.8/km2).

Of all households, 18.2% were made up of individuals and 6.1% had someone living alone who was 65 years of age or older.