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
Map, cities and product lines
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 |
|---|---|---|---|
| Northwestern Steel and Wire | Sterling | — | UNVERIFIED |
| Nucor Tubular Products | Bedford Park | — | UNVERIFIED |
| Oakley Industries INC | Niles | — | UNVERIFIED |
| Odermath USA INC | Naperville | — | UNVERIFIED |
| Olson Aluminum Castings | Rockford | — | UNVERIFIED |
| Olympic Steel | Schaumburg | — | UNVERIFIED |
| Outboard Marine CORP. | Waukegan | — | UNVERIFIED |
| Pechiney Rolled Products LLC | Mc Cook | — | UNVERIFIED |
| Pneu-fast CO the | Evanston | 20–99 | UNVERIFIED |
| Precious Metal Refining Svcs INC | Wauconda | — | UNVERIFIED |
| Precise Castings INC | Saint Charles | — | UNVERIFIED |
| Precision Extrusions LLC | Bensenville | — | UNVERIFIED |
| Primecast, Inc.(former) | South Beloit | — | UNVERIFIED |
| Racer Danville Landfill | Danville | — | UNVERIFIED |
| Republic Technologies International LLC | Harvey | — | UNVERIFIED |
| Reserve Marine Terminal | Chicago | — | UNVERIFIED |
| Robert White | Centralia | — | UNVERIFIED |
| Roll Services INC | Glenwood | — | UNVERIFIED |
| Rubicon Technology | Batavia | — | UNVERIFIED |
| Sandwich Casting & Machine/trio Foundry INC | Montgomery | — | UNVERIFIED |
| Sandwich Iron Foundry | Plano | — | UNVERIFIED |
| Sapa Extrusions INC | Morris | — | UNVERIFIED |
| Sims Recycling Solutions | West Chicago | — | UNVERIFIED |
| Slater Lemont CORP | Lemont | — | UNVERIFIED |
| Small Assemblies INC | Chicago | — | UNVERIFIED |
| Specialloy INC | Chicago | — | UNVERIFIED |
| Sterling Steel Foundry | Sauget | — | UNVERIFIED |
| Therm O Link INC | Morris | — | UNVERIFIED |
| Thompson Steel CO INC | Franklin Park | — | UNVERIFIED |
| Tool King INC | Wheeling | — | UNVERIFIED |
| Trio Foundry INC | Aurora | — | UNVERIFIED |
| United American Metal | Chicago | — | UNVERIFIED |
| US Diecasting INC | Chicago | — | UNVERIFIED |
| US Steel CORP Joliet Works | Joliet | — | UNVERIFIED |
| US Steel - Gary Works | Chicago | — | UNVERIFIED |
| Vermilion Iron Works | Hoopeston | — | UNVERIFIED |
| Wagner Foundry INC | Chicago | — | UNVERIFIED |
| Werner CO | Franklin Park | — | UNVERIFIED |
| West Irving Die INC | Sandwich | — | UNVERIFIED |
| Wirco Castings INC | New Athens | — | UNVERIFIED |
| Woodward Controls INC | Niles | — | UNVERIFIED |
| Aallied of Illinois | Franklin Park | 100–499 | LIKELY ACTIVE |
| AFCO Olmsted | Olmsted | 20–99 | LIKELY ACTIVE |
| Antioch | Antioch | 500+ | LIKELY ACTIVE |
| Charter | Chicao | 1–19 | LIKELY ACTIVE |
| Cincinnati Tool Steel Company | Rockford | 100–499 | LIKELY ACTIVE |
| Cleveland-Cliffs - Corporate Office East Chicago - Corporate | East Chicago | 100–499 | LIKELY ACTIVE |
| Cmd | Elk Grove Village | 20–99 | LIKELY ACTIVE |
| Combined Metals Company LLC - Sycamore | Sycamore | 20–99 | LIKELY ACTIVE |
| Csm Tube USA INC. | Elk Grove Village | 20–99 | LIKELY ACTIVE |
All primary metal manufacturing nationwide · All manufacturing in Illinois