Injection molding has long been a fundamental part of American manufacturing, driving industries ranging from automotive to healthcare with efficiency and precision. In the United States, there are hundreds of companies excelling in this space, but a select few stand out for their innovation, scale, and unwavering commitment to quality. Whether you’re a business owner looking for a trusted manufacturing partner or simply curious about the current state of the industry, this list of top injection molding companies in the USA provides insight into the leaders shaping plastic production in 2025.
At Silfusion, we pride ourselves on being at the forefront of the injection molding industry. We specialize in providing OEM solutions, from custom mold design to mass production, across various sectors including medical, automotive, and electronics. Our commitment to quality, innovation, and customer satisfaction mirrors the excellence seen in the following companies. Let’s take a closer look at some of the top players in injection molding and what makes them exceptional.
1. Berry Global, Inc.
Location: Evansville, Indiana
Founded: 1967
As a Fortune 300 company, Berry Global is a titan in the injection molding world. With over 40,000 employees and more than 250 locations worldwide, Berry Global specializes in plastic packaging and engineered products. The company serves a wide range of industries, including healthcare, consumer goods, and industrial manufacturing. Their dedication to quality and their ability to scale makes them a go-to partner for businesses seeking reliable and efficient solutions in injection molding.
2. Protolabs
Location: Maple Plain, Minnesota
Founded: 1999
Protolabs has redefined the traditional injection molding process with its digital manufacturing approach. By offering rapid prototyping and on-demand production, Protolabs can deliver parts in as little as one day. Their automated quoting and production systems cater to industries like medical, automotive, and aerospace, allowing businesses to get high-quality parts quickly without compromising on precision. Protolabs’ fast turnaround times and state-of-the-art technology have made them a game-changer in the field.
3. Xometry
Location: Washington DC Metro / Maryland
Founded: 2015
Known for its AI-driven platform, Xometry is revolutionizing the injection molding industry. The company connects customers to a global network of over 10,000 manufacturing partners, offering services such as custom plastic injection molding, surface finishing, and precision processing. Serving industries like aerospace, automotive, and medical, Xometry’s ability to blend technology with manufacturing has helped them scale efficiently while maintaining high-quality results.
4. Plastek Industries
Location: Erie, Pennsylvania
Founded: 1956
With one of the largest injection molding facilities in the U.S., Plastek Industries has been a major player in high-volume, precision plastic manufacturing for over six decades. The company serves a variety of sectors, including beauty, food and beverage, and pharmaceutical markets. With 850 employees and a global reach, Plastek’s ability to consistently deliver large-scale production while maintaining tight quality control sets them apart in the injection molding industry.
5. Tessy Plastics
Location: Elbridge, New York
Founded: 1973
Specializing in complex, intricate injection-molded parts, Tessy Plastics has become a trusted name in industries like medical, electronics, and packaging. With over 50 years of experience, Tessy Plastics combines technical expertise with a commitment to innovation, ensuring they can meet the most demanding challenges in injection molding. Their focus on quality and precision makes them a reliable partner for businesses that need high-stakes components.
6. Hi-Tech Mold & Engineering
Location: Rochester Hills, Michigan
Founded: 1980
A full-service provider, Hi-Tech Mold & Engineering offers a range of capabilities, from concept design to final product launch. Specializing in injection molding, insert molding, extrusion, and mold manufacturing, Hi-Tech serves industries like automotive, appliance, and aerospace. As a family-owned business, Hi-Tech blends personalized service with advanced manufacturing technologies, making them a standout in the Midwest’s manufacturing hub.
7. Ironwood Plastics, Inc.
Location: Ironwood, Michigan
Founded: 1979
Ironwood Plastics brings a unique edge to the injection molding industry. Backed by Berkshire Hathaway since 2010, the company specializes in insert molding and engineering-grade materials, delivering complex solutions across various industries. Ironwood’s blend of technical expertise and corporate support ensures they can handle intricate projects, making them a reliable partner for demanding manufacturing needs.
8. Plastikon Industries
Location: Hayward, California
Founded: 1984
Based in California, Plastikon Industries is a leader in the West Coast manufacturing scene. Offering plastic injection molding, mold design, and engineering services, Plastikon caters to the medical, automotive, and electronics industries. Known for its global reputation and customer-first approach, Plastikon exemplifies the innovation and diversity that characterize California’s manufacturing landscape.
9. EVCO Plastics
Location: DeForest, Wisconsin
Founded: 1964
With over 60 years of experience, EVCO Plastics stands tall in the Midwest as a trusted provider of plastic injection molding services. The company offers a range of services, including tool and mold building and contract manufacturing. Their commitment to quality, customer satisfaction, and continuous improvement has earned them a strong reputation in industries like automotive, consumer goods, and electronics.
10. LexaMar Corp
Location: Boyne City, Michigan
Founded: 1996
Specializing in rubber and plastic injection molding for automotive exterior parts, LexaMar Corp is a key player in Michigan’s automotive manufacturing industry. With a focus on precision components for vehicle manufacturers, LexaMar has become a trusted partner for businesses in the automotive sector, providing high-quality products at scale.
11. Seaway Plastics Engineering
Location: Port Richey, Florida
Founded: 1974
Seaway Plastics Engineering stands out for its flexibility. With 250,000 square feet across five facilities, Seaway handles everything from small-batch prototypes to large-scale production. Their services include injection molding, rapid prototyping, and product design, making them a go-to option for businesses with diverse manufacturing needs.
12. Jones Plastic & Engineering
Location: Louisville, Kentucky
Founded: 1961
Rounding out the list, Jones Plastic & Engineering is a key player in the Southern U.S. manufacturing landscape. With over 300 employees, Jones specializes in producing injection-molded parts for a range of industries, including automotive, packaging, and electronics. Their broad market coverage and solid workforce make them a dependable choice for businesses in need of variety and reliability.
Global Reach: Silfusion’s Role in the Industry
While these U.S.-based companies represent some of the finest in the injection molding field, the global landscape also offers standout companies like Silfusion, a China-based innovator making significant waves in the industry. Specializing in OEM injection molding, silicone rubber, and die-cutting products, Silfusion offers end-to-end solutions, from custom mold design to mass production, catering to industries like medical, automotive, and electronics. With certifications including ISO 14001, ISO 9001, and ISO 13485, Silfusion’s commitment to quality and efficient customization makes it a trusted partner for businesses worldwide.
Why These Companies Matter
Injection molding is a cornerstone of modern manufacturing, and the companies listed above represent the best of the best. From Protolabs’ speed and innovation to Silfusion’s global solutions, these companies demonstrate the power of injection molding to drive efficiency, precision, and growth in industries ranging from aerospace to medical devices. Whether you’re looking for a local manufacturing partner or a global collaborator, these firms exemplify the cutting-edge solutions shaping the future of manufacturing.
At Silfusion, we understand the importance of working with trusted partners in the injection molding industry. We combine our expertise with a customer-first approach to provide high-quality, cost-effective solutions tailored to your specific needs. Whether you’re looking for fast prototyping or large-scale production, Silfusion is here to help you achieve your goals. Contact us today to learn more about how we can assist with your injection molding needs and help your business stay ahead in the competitive manufacturing landscape.
