Allentown is a Borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough population was 1,828.
Allentown was incorporated as a borough by an Act of the New Jersey Legislature on January 29, 1889, from portions of Upper Freehold Township, based on the results of a referendum held that day.
Allentown's shopping district has antique and specialty shops, as well as restaurants. Many historic homes and historic buildings are located in the borough.