Harbourton is an unincorporated community located within Hopewell Township in Mercer County, in the U.S. state of New Jersey.

[2] It is located along County Route 579 at the intersection with Harbourton-Mount Airy Road.

The Harbourton Historic District, encompassing the community, was listed on the state and national registers of historic places in 1974.

It was added to the National Register of Historic Places on December 31, 1974 for its significance in agriculture, architecture, and commerce.

The Baptist Church features Carpenter Gothic architecture.