Riverton is a borough located in Burlington County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 2,764, a decrease of 15 from the 2010 census …Riverton is a borough located in Burlington County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 2,764, a decrease of 15 from the 2010 census count of 2,779, which in turn reflected an increase of 20 from the 2,759 counted in the 2000 census.