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

[11] Many historical markers in Mercerville detail the path of the Continental Army under the command of George Washington through the area during the American Revolutionary War.

Originally called "Sandtown", Mercerville is named after General Hugh Mercer, who died on January 12, 1777, due to wounds incurred at the Battle of Princeton.

[12] Mercerville is in southern Mercer County, built around a major intersection known as Five Points.

It is bordered to the east by Hamilton Square, and the center of Trenton, the state capital, is 4 miles (6 km) to the west.

Except for Nottingham Way east of Five Points, the preceding roads contain most of Mercerville's commercial businesses.