New York City, NY
Note: Plastic injection molding facilities are rare within NYC proper due to industrial zoning and real estate costs. The following companies serve the NYC metropolitan area from nearby locations.
1. Autronic Plastics, Inc.
Address: 1150 Motor Parkway, Central Islip, NY 11722
Phone: (516) 333-7577
Website: https://www.apisolution.com/
Email: sales@apisolution.com
Founded: 1953
Employees: Approximately 120
Facility: 100,000 sq. ft.
Services:
Custom plastic injection molding, design and engineering, tool making, rapid prototyping (FDM), automated and manual assembly, ultrasonic welding, heat staking, hot stamping, metal and rubber replacement applications
Industries Served:
Medical/Dental, Life Safety, Security, Lighting, Military, Defense, Aerospace, Healthcare, Automotive, Displays, Consumer Products
Certifications: ISO 9001:2015, UL Listed
Highlight:
A 70+ year family operation specializing in difficult to process engineering resins and high percentage glass filled materials. Their team of designers and engineers holds over 75 client patents and brings products from concept to completion under one roof on Long Island.
2. Alliance Precision Plastics Corporation
Address: 1220 Lee Road, Rochester, NY 14606
Phone: (585) 426-5310
Website: https://www.allianceppc.com/
Founded: 1953
Facility: 170,000 sq. ft. (across facilities)
Services:
Custom injection molding, mold design, mold building, in-house tooling, value-added contract assembly, design and engineering, quality assurance
Industries Served:
Medical and Life Science, Energy and Utility, Industrial Manufacturing, Specialty Markets
Certifications: ISO 9001, ISO 13485, UL Listed, FDA Registered
Highlight:
A 70+ year family-owned manufacturer operating 60+ injection molding presses with a 4,000 sq. ft. clean room. They maintain facilities in Rochester, NY, Spindale, NC, and a partnership operation in Ramos Arizpe, Mexico, providing comprehensive domestic manufacturing for critical path components.
3. Bennett Plastics
Address: 22 Kentucky Ave, Paterson, NJ 07503
Phone: (973) 684-1501
Website: https://www.bennettplastics.com/
Founded: 1982
Facility: 36,000 sq. ft.
Services:
Injection molding, vacuum thermoforming, extrusion, die and laser cutting, CNC machining, metal manufacturing (sheet metal fabrication, CNC metal fabrication), 3D printing, product development, injection mold making and design, product assembly and packaging, part decoration and printing
Industries Served:
Baby Products, Consumer Goods, Electrical Industry, Food Service, Health and Beauty, Industrial Products, Pharmaceuticals, Packaging Products, Toys and Novelty
Certifications: FDA Registered Facility
Highlight:
Located just minutes from New York City, this family-owned manufacturer produces millions of parts annually with all production handled in-house. They offer a Fast-Track Mold Insert Program delivering molded product samples in as little as 5 weeks.
Los Angeles, CA
1. Quality Plastics NZ
Address: 801 S. Palm, Alhambra, CA 91803
Phone: (626) 289-9248
Website: https://www.qualityplasticsnz.com/
Founded: 1963
Services:
Custom plastic injection molding, design and engineering, molds and tooling, production molding, machining, assembly, packaging, value-added services, quality assurance
Industries Served:
Electrical/Electronics, Industrial, Medical and Food Processing, Consumer/Professional Products, Home and Office Products, Lawn and Garden, Building and Construction, Transportation, Furniture and Furnishings
Highlight:
One of the most established plastic injection molding manufacturers in the Los Angeles area, this independently owned company has built its reputation on precision, consistency, and tight cost control since opening in 1963. They serve clients ranging from startups to multinational corporations.
2. Southwest Plastics Co.
Address: 620 W. Foothill Blvd, Glendora, CA 91741
Phone: (626) 963-6919
Website: https://www.southwestplastics.com/
Email: info@southwestplastics.com
Founded: 1974
Employees: Approximately 9
Services:
Thermoset molding, thermoplastic injection molding, transfer molding, compression molding, CNC machining, tooling, assembly, pad printing, testing, packaging, delivery, engineering services
Industries Served:
Automotive, Aerospace, Electronics, Medical Devices, Military, OEMs, Aircraft, Irrigation, Machinery
Certifications: AS9100
Highlight:
A three-generation family business with over 45 years of experience, Southwest Plastics specializes in both thermoplastic and thermoset materials. They are committed to full US-based production and protecting client intellectual property, with particular expertise in high-performance materials for demanding applications.
3. Norco Plastics, Inc.
Address: 14325 Monte Vista Ave., Chino, CA 91710
Phone: (909) 393-4000
Website: https://norcoplastics.com/
Email: info@norcoplastics.com
Founded: 1974
Facility: 88,000 sq. ft.
Services:
Custom plastic injection molding (30 to 2800 ton capacity), large tonnage injection molding, assembly and secondary operations, hot stamping, robotic removal, insert molding, supply chain and logistics, quality control and SPC, tooling maintenance
Industries Served:
Automotive, Construction and Infrastructure, Medical and Healthcare, Agricultural and Irrigation, Consumer and Retail Products, Storage and Distribution
Highlight:
Founded by the Williams family and now in its second generation, Norco operates one of Southern California’s largest injection molding facilities with 25 presses including a 2800-ton machine installed in 2023. They run 24/7 operations serving the Los Angeles, Riverside, Orange County, San Bernardino, and San Diego markets.
Chicago, IL
1. Janler Corporation
Address: 6545 N. Avondale Ave., Chicago, IL 60631
Phone: (773) 774-0166
Website: https://janler.com/
Founded: 1952
Services:
Injection mold design and engineering, mold making, standard injection molding, multi-shot molding, insert molding, in-mold decorating (IMD), mold sampling/qualification, capability studies/CPK runs and PPAP, assembly and post-molding services
Industries Served:
Medical, Packaging, Food and Beverage, Consumer Products
Certifications: ISO 9001:2015, ISO 13485
Highlight:
For over 70 years, Janler has set standards for plastic injection molding and mold-making excellence in Chicago. They specialize in multi-cavity, complex molds with presses ranging from 35 to 500 tons. Every mold with Janler’s name is manufactured in the USA by highly skilled craftsmen who have developed and passed down intricate tooling knowledge for generations.
2. Drummond Industries, Inc.
Address: 639 Thomas Drive, Bensenville, IL 60106
Phone: (630) 509-2055
Website: https://drummondindustries.com/
Founded: 1968
Facility: 50,000 sq. ft.
Services:
Custom plastic injection molding, insert molding, part assembly, part decorating (hot stamping), ultrasonic welding, prototype manufacturing, customer warehousing
Industries Served:
Various industrial and commercial sectors
Highlight:
A family-owned business serving Chicagoland for over 50 years, Drummond recently built a new facility near O’Hare Airport featuring 20 injection molding machines. They operate 24 hours a day, 5 days a week, and maintain an in-house tool room for comprehensive production support.
3. Aztec Plastic Company
Address: 1747 W. Carroll Ave., Chicago, IL 60612
Phone: (312) 733-0900
Website: https://aztecplastic.com/
Email: info@aztecplastic.com
Founded: 1970
Employees: Approximately 20 to 50
Facility: 29,000 sq. ft.
Services:
Custom plastic injection molding, machining, centerless and cylindrical grinding, contract manufacturing, assembly, decorative services, prototyping and 3D printing, defense manufacturing
Industries Served:
Defense, Agriculture and Construction, Alternative Energy, Automotive, Consumer Products, Fluid Handling, Healthcare, Industrial/Appliance, Mining/Oil and Gas, Off Highway, Recreation/Marine
Certifications: AS9100, ISO 9001, WBEN Certified, WOSB Certified, ITAR Registered, Certified Torlon PAI Processor
Highlight:
Recognized as a “Top Performer” in Chicago for custom injection molding, Aztec specializes in metal replacement using structural composite and engineering resins including Torlon, PEEK, and Ultem. Their family has been involved in plastics for four generations, dating back to 1930 when the founder arrived from Germany as a tool and die mold maker.
Notes
The New York City metropolitan area presents unique challenges for plastic injection molding sourcing. The high cost of industrial real estate and zoning restrictions within the five boroughs mean most manufacturers serving NYC clients operate from Long Island, northern New Jersey, or upstate New York. All three companies listed maintain strong logistics capabilities to serve Manhattan and surrounding boroughs efficiently.
Los Angeles and Chicago offer more traditional manufacturing corridors. The LA basin features companies concentrated in the Inland Empire and San Gabriel Valley, while Chicago-area manufacturers cluster in industrial suburbs with easy highway and airport access. Family ownership remains a common thread across all three markets, with several companies now operating under second or third generation leadership.
Certifications vary by target market. Medical-focused manufacturers like Alliance Precision Plastics and Janler maintain ISO 13485 and FDA registration, while aerospace and defense suppliers like Southwest Plastics and Aztec Plastic hold AS9100 and ITAR credentials.
Research conducted January 2026. Verify all information directly with companies before business engagement.