FactoryRegistry

Manufacturing in Winnebago County, Illinois

As of JUL 2026, FactoryRegistry lists 496 manufacturing facilities in Winnebago County, Illinois, sourced from EPA, OSHA and Census records.

FACILITIES
496
CITIES
10
TOP INDUSTRY
Fabricated Metal Product Manufacturing
128 facilities

Cities

Rockford (262)Loves Park (51)South Beloit (38)Rockford (32)Machesney Park (26)Roscoe (19)Loves Park (15)Rockton (9)Seward (6)South Beloit (6)

Top industries

Fabricated Metal Product Manufacturing (128)Miscellaneous Manufacturing (115)Machinery Manufacturing (59)Chemical Manufacturing (32)Nonmetallic Mineral Product Manufacturing (30)Primary Metal Manufacturing (25)

Facilities

Aqua-aerobic Systems INC
Loves Park, IL
ACTIVE333310EMP 100-499
Bergstrom INC
Rockford, IL
ACTIVE333415EMP 100-499
Chem Processing INC
Rockford, IL
ACTIVE332812EMP 20-99
Crandall Stats and Sensors, INC
Machesney Park, IL
ACTIVE334419EMP 20-99
Rockford Ball Screw Company
Rockford, IL
ACTIVE332710EMP 20-99
Westran Thermal Processing, LLC
South Beloit, IL
ACTIVE333994EMP 20-99
Advanced Machine & Engineering CO
Rockford, IL
ACTIVE332710EMP 100-499
Bourn & Koch, INC.
Rockford, IL
ACTIVE333517EMP 20-99
Cellusuede Products, INC
Rockford, IL
ACTIVE314999EMP 20-99
Forest City Gear Company
Roscoe, IL
ACTIVE333612EMP 100-499
Ingenium Aerospace LLC
Rockford, IL
ACTIVE336413EMP 20-99
Ingersoll Machine Tools INC
Rockford, IL
ACTIVE333517EMP 100-499
Modern Advanced Manufacturing LLC
Rockford, IL
ACTIVE332710EMP 20-99
Plastic Parts International, INC
Loves Park, IL
ACTIVE326199EMP 20-99
Precision Dose INC
South Beloit, IL
ACTIVE325412EMP 100-499
Sems and Specials, INC.
Rockford, IL
ACTIVE332722EMP 20-99
Advanced Heat Treating INC
Loves Park, IL
LIKELY ACTIVE332811
Applied Products INC
Machesney Park, IL
LIKELY ACTIVE322220EMP 20-99
Bluewater Thermal Solutions-rockford
Rockford, IL
LIKELY ACTIVE332811EMP 20-99
Dixon Automatic Tool INC
Rockford, IL
LIKELY ACTIVE333249EMP 20-99
Electrol Specialties Company
South Beloit, IL
LIKELY ACTIVE332322
Ge Aviation Systems LLC
Loves Park, IL
LIKELY ACTIVE332911
Hennig, INC
Machesney Park, IL
LIKELY ACTIVE332322
Hmc Products LLC
Caledonia, IL
LIKELY ACTIVE333993EMP 20-99
Jamco Products, INC.
South Beloit, IL
LIKELY ACTIVE332999EMP 100-499
J & M Plating
Rockford, IL
LIKELY ACTIVE332813EMP 100-499
Martin Automatic CO
Rockford, IL
LIKELY ACTIVE333244EMP 100-499
Owens Corning Foam Insulation LLC Rockford
Rockford, IL
LIKELY ACTIVE326140EMP 20-99
Phelps Industries, LLC
Rockford, IL
LIKELY ACTIVE311111EMP 20-99
Progressive Steel Treating, INC
Loves Park, IL
LIKELY ACTIVE332618
Rockford Fastener, INC.
Rockford, IL
LIKELY ACTIVE332722EMP 20-99
Rockford Heat Treaters INC
Rockford, IL
LIKELY ACTIVE332811EMP 20-99
Rockford Powertrain INC
Loves Park, IL
LIKELY ACTIVE336350
Rockford Spring CO
Rockford, IL
LIKELY ACTIVE332613EMP 20-99
Seward Screw LLC
Seward, IL
LIKELY ACTIVE332710EMP 100-499
Swebco Mfg INC
Machesney Park, IL
LIKELY ACTIVE332721EMP 20-99
Target Laser & Machining, INC.
Rockford, IL
LIKELY ACTIVE332322
Top Die Casting CO
South Beloit, IL
LIKELY ACTIVE331521EMP 100-499
Winnebago Foundry INC
South Beloit, IL
LIKELY ACTIVE331511EMP 20-99
Woodward INC
Loves Park, IL
LIKELY ACTIVE336412
Woodward, INC.
Loves Park, IL
LIKELY ACTIVE336412
Zenith Cutter INC
Loves Park, IL
LIKELY ACTIVE332721EMP 20-99
Pierce Biotechnology INC
Rockford, IL
LIKELY ACTIVE325199
Absolute Grinding & Mfg INC
Rockford, IL
LIKELY ACTIVE332710
Accelerated Machine Design & Engineering LLC
Rockford, IL
LIKELY ACTIVE333517
Adapt Plastics, INC.
Loves Park, IL
LIKELY ACTIVE326199
Aeromotive Research and Defense Group, INC.
Rockford, IL
LIKELY ACTIVE325110
AIRCRAFT GEAR CORPORATION - Plant 1
Loves Park, IL
LIKELY ACTIVE336390EMP 20-99
AIRCRAFT GEAR CORPORATION - Plant 2
Rockford, IL
LIKELY ACTIVE336350EMP 20-99
Alert Tubing Fabricators INC.
Loves Park, IL
LIKELY ACTIVE332996