Primary metals manufacturers in Illinois
Illinois has 199 primary metals establishments employing 18,588 people (Census, 2023), and EPA's ECHO database lists 257 active primary metals facilities in the state. By employment it is Illinois's number 11 manufacturing industry, and Illinois ranks number 6 among states for it.
- NAICS subsector
- 331
- Primary Metal Manufacturing
- Establishments
- 199
- Census 2023
- Employees
- 18,588
- Census 2023
- In EPA records
- 257
- With a page here
- 12
- Revised
- November 11, 2026
Primary metals factories with a page
| Facility | What it makes (NAICS) | City |
|---|---|---|
| Allied Tube & Conduit | Iron and Steel Pipe and Tube Manufacturing from Purchased Steel | Harvey |
| Alton Steel Inc | Iron and Steel Mills and Ferroalloy Manufacturing | Alton |
| American Steel Foundries - Granite City | Steel Foundries (except Investment) | Granite City |
| American Zinc Recycling | Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum) | Chicago |
| Arcelormittal Hennepin LLC | Rolled Steel Shape Manufacturing | Hennepin |
| Arcelormittal Riverdale, Inc. - Riverdale Facility | Iron and Steel Mills and Ferroalloy Manufacturing | Riverdale |
| Caterpillar Inc - Mapleton Facility | Iron Foundries | Mapleton |
| Cerro Flow Products LLC | Copper Rolling, Drawing, Extruding, and Alloying | Sauget |
| Granite City Works of United States Steel Corp | Iron and Steel Mills and Ferroalloy Manufacturing | Granite City |
| Gunite Corporation | Iron Foundries | Rockford |
| Keystone Steel & Wire Co | Iron and Steel Mills and Ferroalloy Manufacturing | Peoria |
| Sterling Steel Company LLC | Iron and Steel Mills and Ferroalloy Manufacturing | Sterling |
These are the Illinois primary metals facilities that report to EPA's Toxics Release Inventory. The other 245 in EPA records don't have a page yet.
What these factories make
- Iron and Steel Mills and Ferroalloy Manufacturing (NAICS 331110): 5 facilities
- Iron Foundries (NAICS 331511): 2 facilities
- Iron and Steel Pipe and Tube Manufacturing from Purchased Steel (NAICS 331210): 1 facility
- Steel Foundries (except Investment) (NAICS 331513): 1 facility
- Steel Investment Foundries (NAICS 331512): 1 facility
- Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum) (NAICS 331492): 1 facility
- Rolled Steel Shape Manufacturing (NAICS 331221): 1 facility
- Copper Rolling, Drawing, Extruding, and Alloying (NAICS 331420): 1 facility
- Steel Wire Drawing (NAICS 331222): 1 facility
Where they cluster
Cities with the most active primary metals facilities in EPA records: Chicago (31), Decatur (9), Chicago Heights (8), Rockford (8), Granite City (7).
New primary metals plants in Illinois
Primary metals manufacturing across the US. Everything made in Illinois.