Hamilton Square 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,[10] that is the site of a historic colonial village.

[3] Hamilton Square is in southern Mercer County, 5 miles (8 km) east of Trenton, the state capital.

[5][15] The center of the community is on high ground which drains north toward Miry Run and south toward Pond Run, both of which are west-flowing tributaries of Assunpink Creek leading to the Delaware River in Trenton.

The 2010 United States census counted 12,784 people, 4,532 households, and 3,703 families in the CDP.

[citation needed] People who were born in, residents of, or otherwise closely associated with Hamilton Square include: