Six-Digit NAICS Codes & Titles

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Codes Titles Number of US Businesses
54 Professional, Scientific, and Technical Services 2,256,003
541110Offices of Lawyers344,121
541120Offices of Notaries5,147
541191Title Abstract and Settlement Offices 10,205
541199All Other Legal Services 4,127
541211Offices of Certified Public Accountants 68,335
541213Tax Preparation Services 52,801
541214Payroll Services 2,309
541219Other Accounting Services 68,103
541310Architectural Services42,681
541320Landscape Architectural Services77,480
541330Engineering Services101,053
541340Drafting Services1,903
541350Building Inspection Services5,284
541360Geophysical Surveying and Mapping Services0
541370Surveying and Mapping (except Geophysical) Services13,122
541380Testing Laboratories9,551
541410Interior Design Services45,374
541420Industrial Design Services2,136
541430Graphic Design Services42,762
541490Other Specialized Design Services2,233
541511Custom Computer Programming Services 67,934
541512Computer Systems Design Services 80,863
541513Computer Facilities Management Services 1,143
541519Other Computer Related Services3,981
541611Administrative Management and General Management Consulting Services 155,666
541612Human Resources Consulting Services 12,690
541613Marketing Consulting Services 51,583
541614Process, Physical Distribution, and Logistics Consulting Services 3,456
541618Other Management Consulting Services 234,142
541620Environmental Consulting Services19,578
541690Other Scientific and Technical Consulting Services41,696
541711Research and Development in Biotechnology 1,964
541712Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 23,704
541720Research and Development in the Social Sciences and Humanities 16,574
541810Advertising Agencies24,799
541820Public Relations Agencies19,050
541830Media Buying Agencies1,072
541840Media Representatives4,226
541850Outdoor Advertising2,853
541860Direct Mail Advertising6,489
541870Advertising Material Distribution Services1,577
541890Other Services Related to Advertising 11,140
541910Marketing Research and Public Opinion Polling13,315
541921Photography Studios, Portrait 78,246
541922Commercial Photography 19,020
541930Translation and Interpretation Services6,326
541940Veterinary Services 43,600
541990All Other Professional, Scientific, and Technical Services410,589

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