Port Murray is an unincorporated community and census-designated place located within Mansfield Township in Warren County, New Jersey, United States, that was created as part of the 2010 United States Census. As of the 2010 Census, the CDP's population was 129.The area is served as United States Postal Service ZIP code 07865. The community was named for its location on the Morris Canal and after Colonel James Boyles Murray, the third president of the Morris Canal and Banking Company.