Primary Metal Manufacturing
8,881 FACILITIESAll Census product lines →NAICS 331
The Primary Metal Manufacturing industry, as defined by NAICS 331, is measured by the Bureau of Labor Statistics to have 6096 establishments in the United States as of 2025. This register lists 8881 facilities across the country. Cleveland-Cliffs Burns Harbor LLC, located in Burns Harbor, employed 4003 people in 2025.
SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE
Map, cities and product lines
Top cities
Product lines reported here
These are counts by industry: the Economic Census records what establishments in primary metal manufacturing reported producing, and never names a plant.
Where these plants are53 STATES
Bars are drawn against California, the largest, rather than against the national total.
Common questions
How many primary metal manufacturing facilities are in the United States?
As of NOV 2026, FactoryRegistry lists 8,881 primary metal manufacturing facilities (NAICS 331) across 53 states, compiled from EPA, OSHA and Census records.
Which state has the most primary metal manufacturing facilities?
California, with 901 facilities listed.
How many primary metal manufacturing facilities are still operating?
4,741 of the 8,881 listed carry a recent operating signal in federal data — the register's Active or Likely active status. The rest are listed from their filings alone, which is a gap in the federal record rather than evidence that a plant has closed.