Primary Metal Manufacturing in Illinois
NAICS 331 · IL
This register lists 551 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 Illinois8 FACILITIES
Listing 8 of 9: the facilities with a website, a size band or two sources on record. The rest are in site search.
| Facility | City | Employees | Status |
|---|---|---|---|
| Cast Technologies INC | Peoria | 20–99 | ACTIVE |
| Azz Galvanizing Peoria | Peoria | 20–99 | LIKELY ACTIVE |
| Keystone Steel & Wire CO | Peoria | — | LIKELY ACTIVE |
| Lynch Aluminum MFG Co | Peoria | 20–99 | LIKELY ACTIVE |
| Alcast- Peoria | Peoria | 100–499 | LIKELY ACTIVE |
| Keystone Consolidated Industries, Inc., d/b/a Liberty Steel & Wire-Peoria | Peoria | 500+ | LIKELY ACTIVE |
| Behr Iron & Metal | Peoria | — | UNVERIFIED |
| Cast Technologies INC. | Peoria | — | UNVERIFIED |
All primary metal manufacturing nationwide · All manufacturing in Illinois