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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
Northern States Metals LLCYoungstownOH— ACTIVE
Nucor CorporationBrandenburgKY— ACTIVE
Nucor CorporationCofieldNC— ACTIVE
Oerlikon Metco US INCWestburyNY— ACTIVE
O'fallon Casting, L.l.c.O FallonMO— ACTIVE
Olympus Engineering and Design Works, INCMillcreekUT— ACTIVE
Pa94 Ametek-hamilton Precision MetalsLancasterPA20–99 ACTIVE
Pace Industries LLCNoviMI— ACTIVE
Pacific Cast Technologies, INC.AlbanyOR— ACTIVE
Paramium Technologies, INC.TusconAZ— ACTIVE
Parrish Enterprises, LTD.EnidOK— ACTIVE
Patriot Steel LLCHarrahOK— ACTIVE
Pennsylvania Precision Cast Parts INCLebanonPA— ACTIVE
Phoenix Tailings INCWoburnMA— ACTIVE
Pier Tech LLCChesterfieldMO— ACTIVE
Pittsburgh Pipe & Supply CORP.Saint LouisMO— ACTIVE
Plymouth Tube CompanyHopkinsvilleKY— ACTIVE
Precision M/c Manufacturing, INC.WylieTX— ACTIVE
Primetals Technologies USA LLCAlpharettaGA— ACTIVE
Prism Resources, INC.HoustonTX— ACTIVE
Protocast INCCommerce CityCO— ACTIVE
Pro Tube INCZullingerPA— ACTIVE
Prysmian Cables and Systems Usa, LLCLincolnRI— ACTIVE
Prysmian Cables and Systems Usa, LLCLawrenceburgKY— ACTIVE
Ptr Enterprises, INC.GardenaCA— ACTIVE
Qml INCRumfordRI— ACTIVE
Rangeview INC.El SegundoCA— ACTIVE
Rareform Metals INC.CampbellCA— ACTIVE
Reelement Technologies Operating CORPFishersIN— ACTIVE
Regenx USA INCNewportTN— ACTIVE
Rescue Engineers, INCDanvilleCA— ACTIVE
Reynolds Consumer Products LLCLake ForestIL— ACTIVE
Rhenium Alloys INCElyriaOH— ACTIVE
Ridgeline Elements, INC.WynneAR— ACTIVE
Rise Steel LLCMesaAZ— ACTIVE
Rotometals, INCSan LeandroCA— ACTIVE
Round Ground Metals, INC.Hanover ParkIL— ACTIVE
Royal Metals Co., INC.HonoluluHI— ACTIVE
Rt Welding LLCChino ValleyAZ— ACTIVE
Rudy Iii, ErnestKennedaleTX— ACTIVE
Rushmore Enterprises INCBaytownTX— ACTIVE
Salem Tube, Inc..GreenvillePA100–499 ACTIVE
Sandusky International INCSanduskyOH— ACTIVE
Schoellhorn - Albrecht Machine CO INCSaint LouisMO— ACTIVE
Scm Metal Products LLCDurhamNC100–499 ACTIVE
Sea Wire & Cable INCMadisonAL— ACTIVE
Sharrow Marine LLCShelby TownshipMI— ACTIVE
Skinner CO INCGreenwoodSC— ACTIVE
Skyline Steel, LLCRock HillSC— ACTIVE
Snt Southern Boiler Tubes, LLCHeber SpringsAR— 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.