Yardville is an unincorporated community and census-designated place (CDP) in Hamilton Township, Mercer County, New Jersey, United States.

[9] Yardville is in southern Mercer County, bordered to the northwest by White Horse and to the southeast by Groveville.

Interstate 195 forms part of the northern border of the CDP, while U.S. Route 130 runs through the center of the community, leading southwest 3 miles (5 km) to Bordentown and northeast 9 miles (14 km) to Hightstown.

Trenton, the state capital, is 6 miles (10 km) northwest of Yardville.

[1] The 2010 United States census counted 7,186 people, 2,757 households, and 2,048 families in the CDP.