Allentown is a borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 1,828, reflecting a decline of 54 (-2.9%) from the 1,882 counted in the 2000 Census, which had in turn increased by 54 (+3.0%) from the 1,828 counted in the 1990 Census.
Allentown's shopping district has antique and specialty shops, as well as restaurants. Many historic homes and historic buildings are located in the borough. The Horse Park of New Jersey is a park located near the borough but does have an Allentown mailing address.
The borough received the 'Village Center' designation in 2002, which will allow the borough to receive additional state aid aimed at preserving historic and natural resource sites that are at risk.