Manufacturing Companies in Wisconsin: 115 Verified Firms
Secwyn has verified 115 manufacturing companies based in Wisconsin. The largest groups are All Other Plastics Product Manufacturing (9); Metal Crown, Closure, and Other Metal Stamping (except Automotive) (8); and Machine Shops (7). By headcount, 65% have 51–200 employees, 23% have 201–500 employees, and 12% fall in other size bands. Size is not yet confirmed for 1. Milwaukee has the most (10), followed by Green Bay (9) and Oshkosh (6). Of the 38 whose customers we could confirm, 97% sell to businesses and 11% to consumers.
Company size
- 51–200 employees74 · 64%
- 201–500 employees26 · 23%
- 501–1,000 employees11 · 10%
- 1,001–5,000 employees3 · 3%
- Size not confirmed1 · 1%
Who they sell to, among the 38 companies where we could confirm it: businesses 97%, consumers 11%, government 13%. A company can sell to more than one.
Top cities
- Milwaukee10 · 9%
- Green Bay9 · 8%
- Oshkosh6 · 5%
- Manitowoc5 · 4%
- Waukesha4 · 3%
- Madison3 · 3%
- New Berlin3 · 3%
Cities with fewer than 3 companies are not listed.
Largest sub-industries
| Sub-industry | NAICS | Companies |
|---|---|---|
| All Other Plastics Product Manufacturing | 326199 | 9 |
| Metal Crown, Closure, and Other Metal Stamping (except Automotive) | 332119 | 8 |
| Machine Shops | 332710 | 7 |
| All Other Miscellaneous Fabricated Metal Product Manufacturing | 332999 | 6 |
| Food Product Machinery Manufacturing | 333241 | 5 |
| Sheet Metal Work Manufacturing | 332322 | 4 |
| Cheese Manufacturing | 311513 | 3 |
| Commercial Printing (except Screen and Books) | 323111 | 3 |
A sample of these companies
A few of the 115 manufacturing companies in Wisconsin. Names, websites and contacts are shown after you sign up.
Company #1 · name shown after sign-up
Cheese Manufacturing · 501–1,000 employees
Company #2 · name shown after sign-up
Paper Mills · 201–500 employees · Green Bay
Company #3 · name shown after sign-up
Dog and Cat Food Manufacturing · 51–200 employees
Company #4 · name shown after sign-up
Machine Shops · 51–200 employees · Waukesha
Company #5 · name shown after sign-up
Commercial Printing (except Screen and Books) · 51–200 employees
Company #6 · name shown after sign-up
Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers · 201–500 employees
Find the Wisconsin manufacturing companies that fit what you sell
Describe what you sell and Secwyn shows the companies most likely to buy it, with the reasons for each match. Sign up free and your first 3 company reveals are on us: name, website, description with its source, contact channels and the roles to contact.
How Secwyn verifies these companies
- Every company description is a sentence visible on the company's own website. Inside the product, each one links to its source page.
- Each company has a NAICS industry code, the US government standard for classifying businesses.
- All companies are based in the United States. Location and size come from public sources, including company filings and People Data Labs.
Data updated October 6, 2026.