Manufacturing jobs in Ontario
Manufacturing produces goods through labor and machinery. Workers operate equipment, monitor production, and ensure quality. Technical skills and attention to detail are vital.
There are 245 manufacturing jobs in Ontario, CA. These manufacturing jobs salaries between $43,874 to $83,260 per year.
Job title
Updated Jul 15, 2026
Job title
Ontario, CA
California
Job openings (Ontario)
Machine Operator
Ontario
$21.15
per hour
California
$20.88
per hour
Assembler
Ontario
$18.62
per hour
California
$21.70
per hour
Production Supervisor
Ontario
$83,260
per year
California
$84,909
per year
Production Associate
Ontario
$18.85
per hour
California
$19.81
per hour
Welder
Ontario
$22.99
per hour
California
$30.63
per hour
Press Operator
Ontario
$21.57
per hour
California
$23.68
per hour
Production Worker
Ontario
$19.12
per hour
California
$19.76
per hour
Injection Mold Operator
Ontario
$20.87
per hour
California
$25.46
per hour
Job descriptions below are for educational purposes. Please refer to the employer's job description for complete details.
-
Machine Operator
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Please refer to the employers job description for complete details.
Machine Operators set up, operate, and maintain machinery in manufacturing processes. Technical expertise, mechanical aptitude, and adherence to safety standards are crucial.
Machine Operator jobs take 74 days on average from job posting to starting date. Currently, 2% of job openings are part-time roles.
See 67 jobsAverage pay
Ontario
$21.15 per hourCalifornia
$20.88 per hourSkills
- Manufacturing
- CNC
- Blueprint reading
- CNC programming
- Mechanical knowledge
-
Assembler
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Please refer to the employers job description for complete details.
Assemblers construct product components, follow technical drawings, and ensure quality standards. Proficiency in assembly processes, attention to detail, and tool handling skills are essential.
Assembler jobs take 45 days on average from job posting to starting date. Currently, 4% of job openings are part-time roles.
See 39 jobsAverage pay
Ontario
$18.62 per hourCalifornia
$21.70 per hourSkills
- Assembly
- Manufacturing
- Mechanical knowledge
- Forklift
- Hand tools
-
Production Supervisor
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Please refer to the employers job description for complete details.
Production supervisors oversee teams, manage production schedules and ensure quality standards. Ideal candidates possess leadership skills, strong problem-solving abilities and have experience in production environments.
Production Supervisor jobs take 40 days on average from job posting to starting date. Currently, 1% of job openings are part-time roles.
See 38 jobsAverage pay
Ontario
$83,260 per yearCalifornia
$84,909 per yearSkills
- Manufacturing
- Production planning
- Supply chain
- Demand planning
- Supply chain management
-
Production Associate
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Please refer to the employers job description for complete details.
Production associates assist in manufacturing processes, ensuring efficiency and quality. Candidates should possess mechanical skills, the ability to follow instructions and a strong work ethic.
Production Associate jobs take 50 days on average from job posting to starting date. Currently, 9% of job openings are part-time roles.
See 28 jobsAverage pay
Ontario
$18.85 per hourCalifornia
$19.81 per hourSkills
- Manufacturing
- Assembly
- Mechanical knowledge
- Forklift
- Warehouse experience
-
Welder
Review job description
Please refer to the employers job description for complete details.
Welders join metal parts, interpret blueprints, and maintain equipment. Manual dexterity, technical skills, and understanding of welding techniques are essential. Certification in welding is often required.
Welder jobs take 74 days on average from job posting to starting date. Currently, 3% of job openings are part-time roles.
See 26 jobsAverage pay
Ontario
$22.99 per hourCalifornia
$30.63 per hourSkills
- Welding
- TIG welding
- Fabrication
- Hand tools
- Manufacturing
-
Press Operator
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Please refer to the employers job description for complete details.
Press operators operate machinery to shape materials through pressure. Key skills for this role include machine operation, a strong attention to detail and adherence to safety protocols.
Press Operator jobs take 80 days on average from job posting to starting date. Currently, 1% of job openings are part-time roles.
See 22 jobsAverage pay
Ontario
$21.57 per hourCalifornia
$23.68 per hourSkills
- Manufacturing
- Blueprint reading
- CNC
- CNC programming
- Mechanical knowledge
-
Production Worker
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Please refer to the employers job description for complete details.
Production workers assist in assembling products while adhering to safety and quality standards. Essential skills for this role include teamwork, a strong work ethic and adaptability to diverse tasks.
Production Worker jobs take 69 days on average from job posting to starting date. Currently, 5% of job openings are part-time roles.
See 14 jobsAverage pay
Ontario
$19.12 per hourCalifornia
$19.76 per hourSkills
- Computer skills
- Communication skills
- English
- Warehouse experience
- Assembly
-
Injection Mold Operator
Review job description
Please refer to the employers job description for complete details.
Injection mold operators oversee the injection molding process, producing plastic parts to specifications. Key skills include technical knowledge, attention to detail and experience in molding processes.
Injection Mold Operator jobs take 99 days on average from job posting to starting date. Currently, 1% of job openings are part-time roles.
See 11 jobsAverage pay
Ontario
$20.87 per hourCalifornia
$25.46 per hourSkills
- Plastics injection molding
- Manufacturing
- Quality control
- Production planning
- CNC
Frequently asked questions
How are the job titles and salaries chosen for this page?
Jobs listed on this page highlight the top 10 job titles with the most openings as of updated Jul 15, 2026. Salary estimates are taken from job postings on Indeed in the past 36 months and are updated daily. Please refer to the employer's job description for specific salary information.
How does Machine Operator pay in Ontario compare to the state average?
Machine Operator professionals in Ontario earn an average of $21.15 per hour, compared with the average in California of $20.88 per hour.
How many job openings are currently available in Ontario?
There are 245 open jobs in Ontario. Machine Operator, Assembler and Production Supervisor are among those with the most openings at the moment.
How many openings are available by job title?
There are numerous job openings across all experience levels, with 67 Machine Operator roles, 39 Assembler roles and 38 Production Supervisor openings currently listed.