 The data based on the Census Bureau 2012 Survey of Business Owners lists 2,292 firms in North Potomac.The number of firms with paid employees is 362, and those firms employ 1,579 people.The data are divided using the North American Industry Classification System (NAICS), and the Professional, Scientific, and Technical Services category (NAICS 54) is the leader in firms (168), paid employees (312), annual payroll $16.2 million, and sales $50.4 million.