SIC 8621 — Professional Membership Organizations
SIC 8621 is 'Professional Membership Organizations', a 4-digit Standard Industrial Classification (SIC) code under Major Group 86: Membership Organizations (Division I: Services); it maps to modern 2022 NAICS code(s): 813920 (Professional Organizations).
Description & Classification
SIC code 8621 representing 'Professional Membership Organizations' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 813920 - Professional Organizations (via SIC1987:8621→NAICS1997:81392→2002:813920→2007:813920→2012:813920→2017:813920→2022:813920)
Classification Details
| SIC Code | 8621 |
|---|---|
| Industry Title | Professional Membership Organizations |
| Division | Division I: Services |
| Major Group | Major Group 86: Membership Organizations |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 8621:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 86 Hub — View other legacy industries in this business division.
Related Industries in Major Group 86
Frequently Asked Questions (FAQ)
What industry does SIC code 8621 represent?
SIC 8621 is 'Professional Membership Organizations', a 4-digit Standard Industrial Classification (SIC) code under Major Group 86: Membership Organizations (Division I: Services); it maps to modern 2022 NAICS code(s): 813920 (Professional Organizations).
What is the modern 2022 NAICS mapping for SIC 8621?
SIC code 8621 maps to modern NAICS codes: 813920 - Professional Organizations.