NAICS Code Directory

Browse federal contracting NAICS codes by category. Click any code to see top agencies and active opportunities.

Find NAICS codes for IT & Technology (541511, 541512, 518210), Construction (236220, 237310, 238210), Professional Services (541330, 541611, 541990), Healthcare (621111, 622110), Defense & Manufacturing (334511, 336411, 336614), Administrative Support (561210, 561720), and more. Each NAICS code page shows top federal agencies by spend, active SAM.gov opportunities, and competitor intelligence.

Construction

236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line Construction 237310 Highway, Street, and Bridge Construction 238210 Electrical Contractors 238220 Plumbing, Heating, and Air-Conditioning Contractors

Manufacturing

332710 Machine Shops 334111 Electronic Computer Manufacturing 334511 Search, Detection, Navigation, and Guidance Systems 334290 Other Communications Equipment Manufacturing 334418 Printed Circuit Assembly Manufacturing 336411 Aircraft Manufacturing 336413 Other Aircraft Parts and Equipment Manufacturing 336414 Guided Missile and Space Vehicle Manufacturing 336611 Ship Building and Repairing 339113 Surgical Appliance and Supplies Manufacturing

IT & Technology

511210 Software Publishers 517110 Wired Telecommunications Carriers 517312 Wireless Telecommunications Carriers 518210 Data Processing, Hosting, and Related Services 519130 Internet Publishing and Broadcasting 541511 Custom Computer Programming Services 541512 Computer Systems Design Services 541513 Computer Facilities Management Services 541519 Other Computer Related Services

Professional Services

541110 Offices of Lawyers 541211 Offices of Certified Public Accountants 541219 Other Accounting Services 541310 Architectural Services 541320 Landscape Architectural Services 541330 Engineering Services 541340 Drafting Services 541350 Building Inspection Services 541360 Geophysical Surveying and Mapping Services 541370 Surveying and Mapping Services 541380 Testing Laboratories 541410 Interior Design Services 541420 Industrial Design Services 541430 Graphic Design Services 541490 Other Specialized Design Services 541611 Administrative Management Consulting 541612 Human Resources Consulting Services 541613 Marketing Consulting Services 541614 Process and Logistics Consulting 541618 Other Management Consulting Services 541620 Environmental Consulting Services 541690 Other Scientific and Technical Consulting 541711 Research and Development in Biotechnology 541712 Research and Development in Physical Sciences 541713 Research and Development in Nanotechnology 541714 Research and Development in Other Sciences 541715 R&D in Social Sciences and Humanities 541720 Research and Development in Social Sciences 541810 Advertising Agencies 541820 Public Relations Agencies 541830 Media Buying Agencies 541840 Media Representatives 541850 Outdoor Advertising 541860 Direct Mail Advertising 541910 Marketing Research and Public Opinion Polling 541921 Photography Studios, Portrait 541922 Commercial Photography 541930 Translation and Interpretation Services 541990 All Other Professional, Scientific, and Technical Services

Administrative & Support

561110 Office Administrative Services 561210 Facilities Support Services 561310 Employment Placement Agencies 561320 Temporary Help Services 561330 Professional Employer Organizations 561410 Document Preparation Services 561421 Telephone Answering Services 561499 All Other Business Support Services 561510 Travel Agencies 561612 Security Guards and Patrol Services 561621 Security Systems Services 561710 Exterminating and Pest Control Services 561720 Janitorial Services 561730 Landscaping Services 561990 All Other Support Services 562111 Solid Waste Collection 562211 Hazardous Waste Treatment and Disposal 562910 Remediation Services

Education & Training

611310 Colleges, Universities, and Professional Schools 611430 Professional and Management Development Training 611512 Flight Training 611519 Other Technical and Trade Schools 611699 All Other Miscellaneous Schools and Instruction

Healthcare

524114 Direct Health and Medical Insurance Carriers 621111 Offices of Physicians 621511 Medical Laboratories 621999 All Other Miscellaneous Ambulatory Health Care 622110 General Medical and Surgical Hospitals 624110 Child and Youth Services

Real Estate

531110 Lessors of Residential Buildings 531120 Lessors of Nonresidential Buildings 531190 Lessors of Other Real Estate Property 532111 Passenger Car Rental

Other

423430 Computer and Peripheral Equipment Merchant Wholesalers 423450 Medical Equipment Merchant Wholesalers 424120 Stationery and Office Supplies Merchant Wholesalers 488190 Other Support Activities for Air Transportation 512110 Motion Picture and Video Production 811210 Electronic Equipment Repair and Maintenance 811310 Commercial Machinery Repair and Maintenance 928110 National Security