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Chemical Manufacturing in California

NAICS 325 · CA

The Chemical Manufacturing industry in California has 2,528 establishments, according to the Bureau of Labor Statistics. This register lists 5,132 facilities in California. The AOC LLC facility in Perris employs 1,860 people, according to 2025 data.

SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE

Map, cities and product lines

Biggest counties

Los Angeles1,204San Diego585Orange480Alameda409Santa Clara278San Bernardino277San Mateo267Riverside174

Biggest cities

Plants in California58 FACILITIES

Listing 58 of 267: the facilities with a website, a size band or two sources on record. The rest are in site search.

FacilityCityEmployeesStatus
C S Bio COMenlo Park— ACTIVE
Denali Therapeutics INC.South San Francisco100–499 ACTIVE
Enable Biosciences INCSouth San Francisco1–19 ACTIVE
Garratt-callahan CompanyBurlingame— ACTIVE
Intersect Ent, INC.Menlo Park— ACTIVE
Yenzym Antibodies, LLCBrisbane— ACTIVE
Coherus Oncology, INC.Redwood City100–499 ACTIVE
Dompe U.s. INC.San Mateo— ACTIVE
Genentech INCSouth San Francisco— ACTIVE
Gilead Sciences INCFoster City— ACTIVE
Heirloom Carbon Technologies, INC.Brisbane— ACTIVE
Pylum Biosciences, INC.San Carlos— ACTIVE
Revolution Medicines, INC.Redwood City— ACTIVE
Zion Health INCSan Mateo1–19 ACTIVE
Antheia, INCMenlo Park— ACTIVE
Asegua Therapeutics LLCFoster City— ACTIVE
Baychem, INCMenlo Park— ACTIVE
Cytokinetics, IncorporatedSouth San Francisco— ACTIVE
Geron CORPFoster City— ACTIVE
La Canada Ventures INCSan Mateo— ACTIVE
Lamdagen CorporationSan Mateo— ACTIVE
Lifescient, INC.South San Francisco— ACTIVE
Marwell Bio INCSouth San Francisco— ACTIVE
Orca Biosystems, INCMenlo Park— ACTIVE
Oryn Therapeutics, INC.Redwood City— ACTIVE
Bioamp Diagnostics INCSan Carlos1–19 LIKELY ACTIVE
Natera INCSan Carlos— LIKELY ACTIVE
Pliant Therapeutics INC.South San Francisco— LIKELY ACTIVE
Concrete ChemicalsSan Carlos1–19 UNVERIFIED
AstraZeneca Pharmaceutical LP (Redwood City)Redwood City20–99 LIKELY ACTIVE
Cell GenesysS San Francisco— LIKELY ACTIVE
Genentech INC South CampusS San Francisco— LIKELY ACTIVE
Seaport Environmental - RefiningRedwood City— LIKELY ACTIVE
Genentech INC Founders Research Center (mid Campus)South San Francisco— LIKELY ACTIVE
Nikon Precision INCBelmont100–499 LIKELY ACTIVE
Romeo Packing COHalf Moon Bay20–99 LIKELY ACTIVE
Advanced Medicine INCSouth San Francisco— UNVERIFIED
Alza CORP - Evra SiteRedwood City— UNVERIFIED
Applied Biosystems, LLCFoster City— UNVERIFIED
Catalytica Bay View, INC.East Palo Alto— UNVERIFIED
Compound Focus INC Dba Biofocus Dp1South San Francisco— UNVERIFIED
Dupont KansaiSouth San Francisco— UNVERIFIED
Peninsula Chemical CompanySan Mateo— UNVERIFIED
Romic Environmental Technologies CORPPalo Alto— UNVERIFIED
Silicon Valley Clean WaterRedwood City— UNVERIFIED
Simpson Coatings Group INCSouth San Francisco— UNVERIFIED
Tyco Electronics CorporationMenlo Park— UNVERIFIED
Geron Corporation - CAFoster City20–99 LIKELY ACTIVE
Kidneymetrix INC.Menlo Park— LIKELY ACTIVE
Abbvie Stemcentrx LLCSouth San Francisco— UNVERIFIED

Search all 5,132 facilities

All chemical manufacturing nationwide · All manufacturing in California