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Primary Metal Manufacturing

8,773 FACILITIESAll Census product lines →

NAICS 331

The Primary Metal Manufacturing industry, as defined by NAICS 331, had 6,096 establishments according to the Bureau of Labor Statistics in 2025. Cleveland-Cliffs Burns Harbor LLC, located in Burns Harbor, employed 4,003 people in 2025. This register lists 8,773 facilities.

SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE

Map, cities and product lines
Map of United States manufacturing facilities

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.

Plants in this industry8,773 FACILITIES

FacilityCityStateEmployeesStatus
6k Additive, INC.BurgettstownPA20–99 ACTIVE
Aat Omega, LLCKeystone HeightsFL20–99 ACTIVE
Abbott Ball Company theWest HartfordCT20–99 ACTIVE
A&b Foundry, LLCDallasTX— ACTIVE
Above All Cnc, INC.GoletaCA— ACTIVE
Accurate Castings INCLa PorteIN20–99 ACTIVE
Accurate Forming, LLCHamburgNJ20–99 ACTIVE
Aci Alloys, INCSan JoseCA— ACTIVE
Acme Alliance LLCNorthbrookIL100–499 ACTIVE
Acme Foundry INCCoffeyvilleKS100–499 ACTIVE
A & D Precision Manufacturing, INC.AnaheimCA— ACTIVE
Advanced Structural Technologies, INC.OxnardCA100–499 ACTIVE
Aero Metals INCLa PorteIN— ACTIVE
A. Finkl & Sons CO.ChicagoIL— ACTIVE
Alcumet INCLondonderryNH20–99 ACTIVE
Alexandria Extrusion CompanyAlexandriaMN— ACTIVE
Alleima Special Metals LLCKennewickWA— ACTIVE
Alliance Tubular Products LLC - Alliance Plant (1576010407)AllianceOH100–499 ACTIVE
Allied Locke Industries INCDixonIL— ACTIVE
Allied Tube & Conduit CorporationHarveyIL— ACTIVE
Allison Transmission, INC. Dba Walker Die CastingLewisburgTN100–499 ACTIVE
Alloy Die Casting CO.Buena ParkCA— ACTIVE
Alpha Assembly Solutions, INC.AltoonaPA100–499 ACTIVE
Alton Steel INCAltonIL100–499 ACTIVE
Alu-bra Foundry, INC.BensenvilleIL20–99 ACTIVE
Aluminum Blanking Co., INC.PontiacMI20–99 ACTIVE
Aluminum Die Casting Company, INC.Jurupa ValleyCA20–99 ACTIVE
A & M Engineering, INC.IrwindaleCA20–99 ACTIVE
American Cable CompanyPhiladelphiaPA100–499 ACTIVE
American CastingPryorOK100–499 ACTIVE
American Cast Iron Pipe CompanyBirminghamAL500+ ACTIVE
American Foam CastSylacaugaAL20–99 ACTIVE
American Posts LLCToledoOH20–99 ACTIVE
American Structural Metals INCSomersetWI20–99 ACTIVE
Amerway INCAltoonaPA— ACTIVE
Ames Advanced MaterialsSouth PlainfieldNJ100–499 ACTIVE
Ames Copper GroupShelbyNC20–99 ACTIVE
Amg Vanadium LLCCambridgeOH— ACTIVE
Amsted RailKansas CityKS100–499 ACTIVE
Anchor-harvey Components LLCFreeportIL— ACTIVE
Anderson Steel Supply INCGreat FallsMT20–99 ACTIVE
Arcelormittal Tubular Products USA LLC (0370020133)ShelbyOH500+ ACTIVE
Ardagh Metal Packaging USA CORPOlive BranchMS100–499 ACTIVE
Aristo-cast, INC.AlmontMI20–99 ACTIVE
Ark Technologies, INC.Saint CharlesIL20–99 ACTIVE
Armstrong Mold CorporationEast SyracuseNY20–99 ACTIVE
Arntzen CorporationSharonWI— ACTIVE
Asahi Refining USA INCSalt Lake CityUT— ACTIVE
Asama Coldwater Manufacturing, INC.ColdwaterMI100–499 ACTIVE
Asc Engineered Solutions Llc/columbia Fka AnvilColumbiaPA500+ ACTIVE

Search all 8,773 facilities

Common questions

How many primary metal manufacturing facilities are in the United States?

As of SEP 2026, FactoryRegistry lists 8,773 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 894 facilities listed.

How many primary metal manufacturing facilities are still operating?

4,388 of the 8,773 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.