Skillman is an unincorporated community and census-designated place located within Montgomery Township, in Somerset County, New Jersey, United States. As of the 2010 United States Census, the CDP's population was 242.The area is served as United States Postal Service ZIP Code 08558.It is home to Johnson & Johnson's Consumer Products division and Bloomberg L.P. Financial's offices.All of the public school buildings for Montgomery Township are located in Skillman.