Port Colden is an unincorporated community and census-designated place (CDP)[8] located within Washington Township, in Warren County, in the U.S. state of New Jersey,[9] that was created as part of the 2010 United States Census.

[14] According to the United States Census Bureau, the CDP had a total area of 0.197 square miles (0.509 km2), all of which was land.

[4][15] The 2010 United States census counted 122 people, 55 households, and 34 families in the CDP.

There were 59 housing units at an average density of 300.0 per square mile (115.8/km2).

Of all households, 29.1% were made up of individuals and 10.9% had someone living alone who was 65 years of age or older.