Contract Manufacturing Companies in California

California has approximately 35,000 manufacturing establishments and 1,300,000 manufacturing employees. California is the largest manufacturing state by output, leading in aerospace, semiconductors, medical devices, and food processing across its diverse regional economies.

California is one of the leading states for contract manufacturing. Contract manufacturing encompasses companies that provide manufacturing services to OEMs on a contract basis, producing components, sub-assemblies, and finished products according to customer specifications. Contract manufacturers (CMs) serve multiple industries and customers, leveraging economies of scale and specialized capabilities that OEMs may not maintain in-house.

Precision Machining CMs: Contract manufacturers specializing in high-precision CNC machining for aerospace, medical, and defense customers.

Metal Fabrication CMs: Contract fabricators providing cutting, bending, welding, and finishing services for industrial and commercial customers.

Electromechanical Assembly CMs: Companies providing mechanical assembly, wiring, testing, and system integration services.

Medical Contract Manufacturers: FDA-registered CMs with cleanroom capabilities producing medical devices and components for OEMs.

Electronics Contract Manufacturers: Companies providing PCB assembly, box build, and electronic system manufacturing on a contract basis.

Major industrial centers in California include Los Angeles, San Diego, San Jose, San Francisco, Fresno, Irvine, and Long Beach. These cities have concentrations of manufacturers across sectors including semiconductor manufacturing, aerospace manufacturing, and medical device manufacturing.