Six-Digit NAICS Codes & Titles

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Codes Titles Number of US Businesses
54 Professional, Scientific, and Technical Services 2,644,617
541110Offices of Lawyers378,718
541120Offices of Notaries6,606
541191Title Abstract and Settlement Offices 11,859
541199All Other Legal Services 4,813
541211Offices of Certified Public Accountants 77,340
541213Tax Preparation Services 58,224
541214Payroll Services 2,601
541219Other Accounting Services 80,704
541310Architectural Services47,861
541320Landscape Architectural Services90,108
541330Engineering Services111,372
541340Drafting Services2,438
541350Building Inspection Services6,567
541360Geophysical Surveying and Mapping Services0
541370Surveying and Mapping (except Geophysical) Services14,932
541380Testing Laboratories10,577
541410Interior Design Services57,023
541420Industrial Design Services2,739
541430Graphic Design Services52,664
541490Other Specialized Design Services2,442
541511Custom Computer Programming Services 55,579
541512Computer Systems Design Services 88,816
541513Computer Facilities Management Services 1,273
541519Other Computer Related Services4,115
541611Administrative Management and General Management Consulting Services 170,627
541612Human Resources Consulting Services 13,698
541613Marketing Consulting Services 59,273
541614Process, Physical Distribution, and Logistics Consulting Services 3,690
541618Other Management Consulting Services 272,775
541620Environmental Consulting Services22,038
541690Other Scientific and Technical Consulting Services44,723
541711Research and Development in Biotechnology 1,458
541712Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 25,981
541720Research and Development in the Social Sciences and Humanities 18,755
541810Advertising Agencies29,852
541820Public Relations Agencies22,907
541830Media Buying Agencies1,115
541840Media Representatives4,812
541850Outdoor Advertising3,237
541860Direct Mail Advertising7,996
541870Advertising Material Distribution Services1,928
541890Other Services Related to Advertising 13,377
541910Marketing Research and Public Opinion Polling15,465
541921Photography Studios, Portrait 97,254
541922Commercial Photography 23,698
541930Translation and Interpretation Services7,413
541940Veterinary Services 46,530
541990All Other Professional, Scientific, and Technical Services566,644

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