Wharton is a borough in Morris County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 6,522, reflecting an increase of 224 from the 6,298 counted in the 2000 Census, which had in turn increased by 893 from the 5,405 counted in the 1990 Census.Wharton was originally incorporated as the borough Port Oram by an act of the New Jersey Legislature on June 26, 1895, created from portions of Randolph Township and Rockaway Township, subject to the results of a referendum passed on the previous day; the name was changed to Wharton on April 16, 1902, based on a referendum held that day and subject to legislation passed on March 27, 1902. The borough was named for Joseph Wharton of the Wharton Steel Company.