Yardville-Groveville is a census-designated place and unincorporated area located within Hamilton Township, in Mercer County, New Jersey. As of the United States 2000 Census, the CDP population was 9,208. Yardville-Groveville apartments for rent comparison page shows most up to date rent information on Yardville-Groveville apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.