Primary Metal Manufacturing in Illinois

NAICS 331 · IL

This register lists 550 facilities in Illinois. The Bureau of Labor Statistics counted 336 establishments in the Primary Metal Manufacturing industry in Illinois in 2025. Mapleton Foundry in Mapleton employed 1,186 people in 2025.

SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE

Plants in Illinois384 FACILITIES

Listing 384 of 550: the facilities with a website, a size band or two sources on record. The rest are in site search.

Facility	City	Employees	Status
GCGunite Corporation	Rockford	—	◐ LIKELY ACTIVE
KCKettler Casting CO INC	Belleville	20–99	◐ LIKELY ACTIVE
KSKeystone Steel & Wire CO	Peoria	—	◐ LIKELY ACTIVE
LALynch Aluminum MFG Co	Peoria	20–99	◐ LIKELY ACTIVE
MLMaruichi Leavitt Pipe & Tube	Chicago	100–499	◐ LIKELY ACTIVE
MMMayco Mfg LLC	Granite City	—	◐ LIKELY ACTIVE
NENehring Electrical Works/Conex Cable	Dekalb	100–499	◐ LIKELY ACTIVE
NSNelsen Steel & Wire LP	Franklin Park	—	◐ LIKELY ACTIVE
NSNippon Sharyo Manufacturing LLC	Rochelle	—	◐ LIKELY ACTIVE
Reynolds Consumer Products LLC	Wheeling	100–499	◐ LIKELY ACTIVE
RIRiverdale Industries LLC	Riverdale	20–99	◐ LIKELY ACTIVE
SCSpectrulite Consortium Incorporated	Madison	—	◐ LIKELY ACTIVE
TDT & D Metal Products	Watseka	100–499	◐ LIKELY ACTIVE
TCTechalloy CO INC	Union	—	◐ LIKELY ACTIVE
WIWebco Industries	Lyndon	—	◐ LIKELY ACTIVE
Wieland Rolled Products North America, LLC	East Alton	—	◐ LIKELY ACTIVE
ACAir Caster LLC	Decatur	1–19	◐ LIKELY ACTIVE
ASAmerican Steel Foundries - Granite City	Granite City	—	◐ LIKELY ACTIVE
ACArntzen CORP	Woodstock	—	◐ LIKELY ACTIVE
ACArntzen CORP	Rockford	—	◐ LIKELY ACTIVE
CCCentury Castings CORP	Belleville	20–99	◐ LIKELY ACTIVE
CFCerro Flow Products LLC	Sauget	—	◐ LIKELY ACTIVE
CMCharter Manufacturing CO INC	Woodstock	—	◐ LIKELY ACTIVE
CSCorey Steel CO	Cicero	—	◐ LIKELY ACTIVE
EBElectron Beam Technologies INC	Kankakee	20–99	◐ LIKELY ACTIVE
ESElgiloy Specialty Metals	Hampshire	—	◐ LIKELY ACTIVE
ESElgiloy Specialty Metals	Sycamore	—	◐ LIKELY ACTIVE
FMFrantz Mfg CO	Sterling	20–99	◐ LIKELY ACTIVE
GEGateway Energy & Coke CO LLC	Granite City	—	◐ LIKELY ACTIVE
HSHanna Steel CORP	Pekin	—	◐ LIKELY ACTIVE
MCMaclean-fogg Component Systems	Mundelein	—	◐ LIKELY ACTIVE
MSMain Steel Polishing CO INC	Elk Grove Village	—	◐ LIKELY ACTIVE
MMMandel Metals INC.	Franklin Park	20–99	◐ LIKELY ACTIVE
MMMid-west Manufacturing CO	Chicago Heights	—	◐ LIKELY ACTIVE
MCMueller CO	Decatur	—	◐ LIKELY ACTIVE
MCMueller CO	Decatur	—	◐ LIKELY ACTIVE
MCMueller CO	Decatur	—	◐ LIKELY ACTIVE
NENehring Electrical Works CO	Dekalb	—	◐ LIKELY ACTIVE
NANichols Aluminum LLC	Lincolnshire	—	◐ LIKELY ACTIVE
NTNucor Tubular Products INC	Marseilles	—	◐ LIKELY ACTIVE
OWOlin Winchester LLC	East Alton	—	◐ LIKELY ACTIVE
PAPrecision Aluminum - Foundry Division	Rock Island	—	◐ LIKELY ACTIVE
RAReal Alloy Recycling LLC	Chicago Heights	—	◐ LIKELY ACTIVE
SPSims Precious Metals	Franklin Park	—	◐ LIKELY ACTIVE
SSSkyline Steel	Newton	—	◐ LIKELY ACTIVE
TATialco Aluminum LLC	Chicago Heights	—	◐ LIKELY ACTIVE
UEUniversal Electric Foundry INC	Chicago	—	◐ LIKELY ACTIVE
UMUniversal Metal Service CORP	South Holland	—	◐ LIKELY ACTIVE
WRWieland Rolled Products NA - East Alton Casting Plant	East Alton	—	◐ LIKELY ACTIVE
AMAllied Metal CO	Chicago	—	◇ UNVERIFIED

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