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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
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 industry6,017 FACILITIES

Listing 6,017 of 8,881: the facilities with a website, a size band or two sources on record. The rest are in site search.

FacilityCityStateEmployeesStatus
Magpro, LLCCamdenTN20–99 ACTIVE
Malin CompanyBrookparkOH20–99 ACTIVE
Marblecast Products, INC.Salt Lake CityUT1–19 ACTIVE
Markin TubingWyomingNY20–99 ACTIVE
Marmon Utility LLCSeymourCT100–499 ACTIVE
Mastermelt America LLCSweetwaterTN20–99 ACTIVE
Matalco INCWisconsin RapidsWI20–99 ACTIVE
Matalco Shelbyville LLCShelbyvilleKY100–499 ACTIVE
Materion Brush INCElmoreOH500+ ACTIVE
Matthews International CorporationPittsburghPA— ACTIVE
Maynard Steel Casting COMilwaukeeWI100–499 ACTIVE
Mcwane Ductile - New JerseyPhillipsburgNJ100–499 ACTIVE
M-d Building Products, INC.Oklahoma CityOK500+ ACTIVE
Mdc Precision LLCHaywardCA100–499 ACTIVE
Med-pac INCLake ParkMN1–19 ACTIVE
M E Global INCTempeAZ100–499 ACTIVE
Meloon Foundries, LLCSyracuseNY20–99 ACTIVE
Merit Steel CompanyKoutsIN20–99 ACTIVE
Metal Flow CorporationHollandMI100–499 ACTIVE
Metallic Resources INCTwinsburgOH20–99 ACTIVE
Metallus INC.CantonOH500+ ACTIVE
Metal Technologies Auburn LLCAuburnIN100–499 ACTIVE
Metaltek International, INC.WaukeshaWI500+ ACTIVE
Metalx Aluminum Conversions LLCWabashIN100–499 ACTIVE
Metco IndSaint MarysPA100–499 ACTIVE
Metglas, INCConwaySC100–499 ACTIVE
Metro Boiler Tube Company, INC.RinggoldGA100–499 ACTIVE
Metro Steel & Pipe Supply, INC.TavaresFL20–99 ACTIVE
Michigan Seamless Tube, LLCSouth LyonMI100–499 ACTIVE
Micro-tek CorporationCinnaminsonNJ20–99 ACTIVE
Midwest Bale Ties INCCrawfordsvilleIN1–19 ACTIVE
Miller Castings INCWhittierCA100–499 ACTIVE
Milwaukee Precision Casting INCMilwaukeeWI— ACTIVE
Minalex CORPWhitehouse StationNJ20–99 ACTIVE
Minnesota Wire & Cable COSaint PaulMN— ACTIVE
Minova USA INCGeorgetownKY— ACTIVE
Mitternight Boiler Works INCSatsumaAL20–99 ACTIVE
Morel Industries, INCArlingtonWA— ACTIVE
Morgan Advanced Ceramics, INC.HaywardCA100–499 ACTIVE
Mueller Brass CO.Port HuronMI100–499 ACTIVE
Mueller COAlbertvilleAL500+ ACTIVE
Mueller Impacts Co, INCMarysvilleMI20–99 ACTIVE
Multimetco INCAnnistonAL20–99 ACTIVE
Mws Precision Wire Industries, INC.OxnardCA20–99 ACTIVE
Nathan Trotter and Co., INCCoatesvillePA20–99 ACTIVE
Nav-x, LLCFort LauderdaleFL1–19 ACTIVE
Neuman Aluminium Impact Extrusion, INC.WaynesboroVA20–99 ACTIVE
New England Wire Technologies CORP.LisbonNH100–499 ACTIVE
Ngk Metals CorporationSweetwaterTN20–99 ACTIVE
Noble Metals Services, INC.CranstonRI1–19 ACTIVE

Search all 8,881 facilities

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.