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Primary Metal Manufacturing

8,651 FACILITIESAll Census product lines →

NAICS 331

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 industry8,651 FACILITIES

FacilityCityStateEmployeesStatus
American Earth Anchors INCWoonsocketRI— ACTIVE
American Hydroformers, INC.Fort WayneIN— ACTIVE
American Piping Supply, INCMaconGA— ACTIVE
Americas Rare Earth CORPPittstonPA— ACTIVE
Ampal INC.PalmertonPA— ACTIVE
Ampco Metal INCSturtevantWI— ACTIVE
Anomet Products INCShrewsburyMA— ACTIVE
Anspanner, LLCHealdsburgCA— ACTIVE
Antimony Refining Company, LLCHoustonTX— ACTIVE
Apmfg Fabricators INCSan MarcosCA— ACTIVE
Arconic CorporationPittsburghPA— ACTIVE
Artesia Metals INCArtesiaNM— ACTIVE
Associated Fastening Products, INC.ItascaIL— ACTIVE
At Ease Sustainment LLCPataskalaOH— ACTIVE
Ati Flat Rolled Products Holdings, LLCPittsburghPA— ACTIVE
Ati Specialty Alloys & Components, LLCPittsburghPA— ACTIVE
Ati Specialty Materials LLCPittsburghPA— ACTIVE
Atlantic Alumina Company LLCGramercyLA— ACTIVE
Atlas Bronze Casting LLCSalt Lake CityUT— ACTIVE
Baikowski International CORPCharlotteNC— ACTIVE
Barry a Dorfman & COLos AngelesCA— ACTIVE
Bastech INCDaytonOH— ACTIVE
Beneke Holdings LLCLouisvilleKY— ACTIVE
Best Ironworks and Screens, INCEl PasoTX— ACTIVE
Bestwill CorporationIrvineCA— ACTIVE
Bishtec LLCBlackfootID— ACTIVE
Black Bay Ventures Vi, LLCPalmerMA— ACTIVE
Black Hills Metal Fabricators, LLCRapid CitySD— ACTIVE
Blue Bayou Brass, INCHoustonTX— ACTIVE
Blue Star Military Alloys and Supplies INCBoca RatonFL— ACTIVE
Bolton Metal Products CO. INC.State CollegePA— ACTIVE
Bomar Tactical Training Group LLCChandlerAZ— ACTIVE
Boston Electrometallurgical CORPWoburnMA— ACTIVE
Boyce Iron and Steel IncorporatedNiederwaldTX— ACTIVE
Bright Horizon Metals, INC.SumnerWA— ACTIVE
Brost Cleveland LLCClevelandOH— ACTIVE
Buffalo Armory Group, LLCBuffaloNY— ACTIVE
Cal-sierra Pipe, LLCStocktonCA— ACTIVE
Camden Copper Holdings LLCCamdenSC20–99 ACTIVE
Cannon-muskegon CORPNorton ShoresMI— ACTIVE
Carley Foundry, INCMinneapolisMN— ACTIVE
Carpenter Brothers, INC.MequonWI— ACTIVE
Carter Alloys CompanyBryn MawrPA— ACTIVE
Cavalier Steel & Fence CODarbyPA— ACTIVE
Cb Marcellus Metalcasters INCPlainwellMI— ACTIVE
Ccm Mfg LLCVanderbiltMI— ACTIVE
Choice Steel COAlbuquerqueNM— ACTIVE
Clayens Us, LLCLovelandCO— ACTIVE
Cmp Global INCSuffolkVA— ACTIVE
Conn. Engineering Assoc. CORPSandy HookCT— ACTIVE

Search all 8,651 facilities

Common questions

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

As of AUG 2026, FactoryRegistry lists 8,651 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 877 facilities listed.

How many primary metal manufacturing facilities are still operating?

3,820 of the 8,651 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.