Manufacturing Companies in California: 232 Verified Firms
Secwyn has verified 232 manufacturing companies based in California. The largest groups are Machine Shops (14); Commercial Printing (except Screen and Books) (10); and Cut and Sew Apparel Manufacturing (except Contractors) (10). By headcount, 79% have 51–200 employees, 14% have 201–500 employees, and 7% fall in other size bands. Size is not yet confirmed for 4. Irvine has the most (12), followed by Los Angeles (10) and San Jose (9). Of the 64 whose customers we could confirm, 98% sell to businesses and 13% to consumers.
Company size
- 51–200 employees179 · 77%
- 201–500 employees32 · 14%
- 501–1,000 employees17 · 7%
- Size not confirmed4 · 2%
Who they sell to, among the 64 companies where we could confirm it: businesses 98%, consumers 13%, government 17%. A company can sell to more than one.
Top cities
- Irvine12 · 5%
- Los Angeles10 · 4%
- San Jose9 · 4%
- Anaheim8 · 3%
- San Diego7 · 3%
- Santa Clara5 · 2%
- Santa Fe Springs5 · 2%
- Torrance5 · 2%
- Beverly Hills4 · 2%
- Brea4 · 2%
Cities with fewer than 3 companies are not listed.
Largest sub-industries
| Sub-industry | NAICS | Companies |
|---|---|---|
| Machine Shops | 332710 | 14 |
| Commercial Printing (except Screen and Books) | 323111 | 10 |
| Cut and Sew Apparel Manufacturing (except Contractors) | 315250 | 10 |
| All Other Plastics Product Manufacturing | 326199 | 9 |
| Toilet Preparation Manufacturing | 325620 | 9 |
| Other Aircraft Parts and Auxiliary Equipment Manufacturing | 336413 | 8 |
| Fabricated Structural Metal Manufacturing | 332312 | 5 |
| All Other Miscellaneous Electrical Equipment and Component Manufacturing | 335999 | 4 |
A sample of these companies
A few of the 232 manufacturing companies in California. Names, websites and contacts are shown after you sign up.
Company #1 · name shown after sign-up
Cutting Tool and Machine Tool Accessory Manufacturing · 51–200 employees
Company #2 · name shown after sign-up
Commercial Printing (except Screen and Books) · 51–200 employees · Van Nuys
Company #3 · name shown after sign-up
All Other Plastics Product Manufacturing · 51–200 employees · Los Angeles
Company #4 · name shown after sign-up
Packaging Machinery Manufacturing · 51–200 employees
Company #5 · name shown after sign-up
Other Aircraft Parts and Auxiliary Equipment Manufacturing · 51–200 employees
Company #6 · name shown after sign-up
Wineries · 201–500 employees
Find the California 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.