Industry Classification Hubs
Industry Classification Hubs
Industry Classification Hubs group all NAICS and SIC codes into 19 top-level sectors of the U.S. economy. Each hub acts as a parent category for thousands of code detail pages, helping users and systems navigate the official numeric hierarchy more clearly.
Use these hubs to browse broad sectors first, then drill down into more specific industries, subsectors, and code ranges. This structure supports easier discovery, cleaner rollups, and stronger alignment between high-level industry categories and detailed code pages.
Start here: Browse a sector below to open its hub page. For methodology, governance, and review standards behind these hubs, see the Classification Governance & Standards page and the Authority & Trust Hub.
Explore the sector map
Select a sector to open its hub page. Each node shows its main NAICS and SIC ranges for quick numeric context.
Explore all industry hubs
Agriculture, Forestry, Fishing & Hunting
NAICS: 11 | SIC: 01–09
Covers crop production, livestock, timber operations, aquaculture, and agricultural support activities across the natural resource economy.
View the Agriculture Hub Open Agriculture hub pageMining, Quarrying & Oil/Gas Extraction
NAICS: 21 | SIC: 10–14
Includes mineral extraction, drilling operations, crude petroleum production, natural gas extraction, and quarrying under highly regulated operating environments.
View the Mining Hub Open Mining hub pageUtilities
NAICS: 22 | SIC: 46, 49
Encompasses electric power generation, transmission, distribution, natural gas delivery, and water systems that support essential infrastructure.
View the Utilities Hub Open Utilities hub pageConstruction
NAICS: 23 | SIC: 15–17
Covers residential, commercial, industrial, and infrastructure construction, along with specialty trades such as electrical, plumbing, roofing, and HVAC.
View the Construction Hub Open Construction hub pageManufacturing
NAICS: 31–33 | SIC: 20–39
Includes food processing, chemicals, plastics, metals, machinery, electronics, and advanced manufacturing across industrial supply chains.
View the Manufacturing Hub Open Manufacturing hub pageWholesale Trade
NAICS: 42 | SIC: 50–51
Wholesale distributors that buy, store, and resell durable and nondurable goods to retailers, contractors, and other B2B customers.
View the Wholesale Hub Open Wholesale hub pageRetail Trade
NAICS: 44–45 | SIC: 52–57, 59
Retailers selling goods directly to consumers through stores, e-commerce, and specialty shops across major consumer categories.
View the Retail Hub Open Retail hub pageTransportation & Warehousing
NAICS: 48–49 | SIC: 40–45, 47
Freight carriers, logistics providers, warehousing operations, and related support industries that move and store goods.
View the Transportation Hub Open Transportation hub pageInformation
NAICS: 51 | SIC: 27, 48, 73 (partial)
Includes publishing, broadcasting, telecommunications, data processing, hosting, and digital media industries centered on information creation and transmission.
View the Information Hub Open Information hub pageFinance & Insurance
NAICS: 52 | SIC: 60–64, 66
Banking, lending, investment services, insurance carriers, and financial intermediaries that manage risk, capital, and financial assets.
View the Finance Hub Open Finance hub pageReal Estate, Rental & Leasing
NAICS: 53 | SIC: 65, 67
Property managers, leasing firms, real estate agencies, and asset-holding businesses supporting real property markets.
View the Real Estate Hub Open Real Estate hub pageProfessional, Scientific & Technical Services
NAICS: 54 | SIC: 73 (partial), 87 (majority)
Specialized service providers such as legal, engineering, accounting, research, design, consulting, and scientific laboratories.
View the Professional Services Hub Open Professional Services hub pageAdministrative & Waste Management Services
NAICS: 56 | SIC: 73 (partial), 87 (partial), 88
Employment services, facilities support, custodial work, landscaping, waste management, and remediation that support daily operations and compliance.
View the Administrative Services Hub Open Administrative Services hub pageEducational Services
NAICS: 61 | SIC: 82
Schools, colleges, universities, technical institutes, tutoring centers, and other educational programs providing academic and vocational training.
View the Education Hub Open Education hub pageHealthcare & Social Assistance
NAICS: 62 | SIC: 80, 83, 86
Medical providers, hospitals, clinics, nursing care, and social programs serving individuals and communities.
View the Healthcare Hub Open Healthcare hub pageArts, Entertainment & Recreation
NAICS: 71 | SIC: 79
Performing arts groups, spectator sports, amusement parks, museums, fitness centers, and recreational facilities.
View the Arts & Recreation Hub Open Arts and Recreation hub pageAccommodation & Food Services
NAICS: 72 | SIC: 58, 70
Restaurants, bars, caterers, hotels, motels, and lodging services supporting hospitality, dining, and tourism.
View the Accommodation & Food Hub Open Accommodation and Food hub pageOther Services (Except Public Administration)
NAICS: 81 | SIC: 72, 75, 76, 78, 81, 84, 86, 88, 89
Personal services, repair shops, nonprofits, religious organizations, civic groups, and miscellaneous service providers not classified elsewhere.
View the Other Services Hub Open Other Services hub pagePublic Administration
NAICS: 92 | SIC: 91–99
Federal, state, and local government agencies responsible for regulation, public safety, administration, and governance.
View the Public Administration Hub Open Public Administration hub pageWhy these hubs matter
- They organize NAICS and SIC structures into broader industry sectors for easier top-down navigation.
- They help users move from a general industry concept to the most relevant detailed code page.
- They improve comparability across sectors by keeping code browsing tied to official numeric hierarchy.
Frequently Asked Questions
What are Industry Classification Hubs?
Industry Classification Hubs organize all NAICS and SIC codes into 19 major industry groups. Each hub represents a broad sector of the economy and links to the detailed industries within that sector.
How do NAICS and SIC codes relate to these hubs?
Each hub corresponds to a specific range of NAICS and SIC codes based on the numeric hierarchy of the two systems. Any code that falls within those ranges is part of that broader sector.
Why are these hubs useful?
They help users navigate thousands of codes by providing a clearer top-level structure. This makes it easier to compare sectors, understand industry relationships, and find the right code starting point when only the general industry is known.
How do I find the correct NAICS or SIC code for a business?
If you know the general industry, start by browsing the relevant hub. If you are unsure or need confirmation, use our expert-supported service: Get Your Verified NAICS/SIC Code
Where can I learn more about the methodology behind these hubs?
Use these references for methodology, trust, and review standards:
Authority & Trust Hub
Classification Methodology
Industry Classification Review Team
Citations & Academic Recognition
Industry Intelligence Center