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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
Hoeganaes CORPWatsontownPA20–99 ACTIVE
Honeywell Electronic MaterialsFombellPA20–99 ACTIVE
Howmet CORP - Dover AlloyDoverNJ100–499 ACTIVE
Huntington Alloys CorporationHuntingtonWV500+ ACTIVE
Huron Casting INCPigeonMI100–499 ACTIVE
Hussey Copper LTDEminenceKY100–499 ACTIVE
Hydro Aluminum Metals USA LLCHendersonKY20–99 ACTIVE
Hydro Extrusion Portland, INC.PortlandOR20–99 ACTIVE
Hydro Extrusion USA LLC - Cressona FacilityCressonaPA— ACTIVE
Indiana Pickling & Processing CompanyPortageIN20–99 ACTIVE
Indium Corporation of America, theClintonNY— ACTIVE
Innovative Works INC.ChesterfieldMI— ACTIVE
Interconnect Solutions CO LLCFountain ValleyCA100–499 ACTIVE
Jamestown North America, LLCHoustonTX20–99 ACTIVE
Jersey Shore Steel COJersey ShorePA100–499 ACTIVE
J. H. Botts, LLCJolietIL20–99 ACTIVE
J. K. Pulley Company, INC.Saint LouisMO20–99 ACTIVE
John Deere Waterloo Works Drivetrain Operations & FoundryWaterlooIA500+ ACTIVE
Jupiter Aluminum CORPHammondIN100–499 ACTIVE
Jw Aluminum CompanyGoose CreekSC100–499 ACTIVE
Kaba Ilco CorporationRocky MountNC100–499 ACTIVE
Kaiser Aluminum Alexco LLCChandlerAZ100–499 ACTIVE
Kaiser Aluminum Fabricated Products, LLCFlorenceAL20–99 ACTIVE
Kamtek INCBirminghamAL500+ ACTIVE
Kanthal CorporationBethelCT20–99 ACTIVE
Kawneer CO INCBloomsburgPA100–499 ACTIVE
Kennametal INCLa VergneTN100–499 ACTIVE
Keymark CORP of FloridaLakelandFL100–499 ACTIVE
Kingsbury Castings DivisionKingsburyIN20–99 ACTIVE
Kittyhawk INCGarden GroveCA20–99 ACTIVE
Knoxville Sheet Metal Works, INCKnoxvilleTN20–99 ACTIVE
Kovatch Castings, INCUniontownOH100–499 ACTIVE
Kreisler Industrial CorporationElmwood ParkNJ100–499 ACTIVE
Kuprion, INC.San JoseCA20–99 ACTIVE
Kutztown Foundry & Machine LLCKutztownPA20–99 ACTIVE
Kvf-quad, CorporationEast MolineIL20–99 ACTIVE
Kyocera Senco Industrial Tools, INCCincinnatiOH100–499 ACTIVE
Latrobe Specialty Metals Co, LLCLatrobePA— ACTIVE
L E Jones COMenomineeMI100–499 ACTIVE
Le Sueur, IncorporatedLe SueurMN100–499 ACTIVE
Libertas CopperLeetsdalePA100–499 ACTIVE
Linear Motion LLCSaginawMI100–499 ACTIVE
Littlestown Hdwr & FoundryLittlestownPA20–99 ACTIVE
Madden Bolt CorporationHoustonTX100–499 ACTIVE
Magpro, LLCCamdenTN20–99 ACTIVE
Mahle Engine Components USA INCMcconnelsvilleOH20–99 ACTIVE
Malin CompanyBrookparkOH20–99 ACTIVE
Marmon Utility LLCSeymourCT100–499 ACTIVE
Mastermelt America LLCSweetwaterTN20–99 ACTIVE
Matalco INCWisconsin RapidsWI20–99 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.