Top 10 Plastic Injection Molding Companies In US

Plastic injection molding is a widespread industry in the United States. However, it’s not the global growth driver of the injection molding industry, but it’s China. This country lifted over 700 million people out of poverty within a span of thirty years. It is famously named “Worlds Factory” for an excellent reason.

Top 10 Plastic Injection Molding Companies In US

Things were going fine for China, but then the COVID-19 pandemic shook the world, forcing people to move their manufacturing units and supply chains from China.

Interestingly, one study found that 62% of manufacturers want to source more supplies domestically in 2021.

The noted industrial marketplace IndustryNet is witnessing a surge in domestic sourcing activity, especially in the plastic injection molding sector, which recorded more than 1500 searches from industrial buyers interested in plastic molding services in 2021: year-on-year category searches, requests for quotes, and catalog downloads have seen a significant spike.

The trend shows growing demand for more domestic manufacturers looking for domestic plastic injection molding supplies.

Meanwhile, let’s take a look at the top 10 plastic injection molding companies in the United States:

Top 10 Plastic Injection Molding Companies In terms of employee Strength 

No. of Employees
Jones Plastic & Engineering Co., LLCLouisville, KY2400
Plastek Industries, Inc.Erie, PA1200
LexaMar Corp.Boyne City, MI325
Ironwood Plastics, Inc.Ironwood, MI210
American Tool & Mold, Inc.Clearwater, FL180
Hi-Tech Mold & Engineering, Inc.Rochester Hills, MI175
Seaway Plastics Engineering, LLCPort Richey, FL122
Decatur Mold, Tool & Engineering, Inc.North Vernon, IN110
MMI Engineered SolutionsSaline, MI86
Alwin Manufacturing Co IncGreen Bay, WI75

Top 10 Plastic Injection Molding Companies In terms of Revenue 

Revenue in USD
Plastek Industries, Inc.Erie, PA369.39 million
Jones Plastic & Engineering Co., LLCLouisville, KY
313.35 million USD
LexaMar Corp.Boyne City, MI106.91 million
Hi-Tech Mold & Engineering, Inc.Rochester Hills, MI50.44 million
American Tool & Mold, Inc.Clearwater, FL29.21 million
MMI Engineered SolutionsSaline, MI28.66 million
Ironwood Plastics, Inc.Ironwood, MI28.21 million
Decatur Mold, Tool & Engineering, Inc.North Vernon, IN28.00 million
Alwin Manufacturing Co IncGreen Bay​, WI19.25 million
Seaway Plastics Engineering, LLCPort Richey, FL18.97 million

Engaging Read – Top 10 Plastic Manufacturers in the World

Information About Top 10 Injection Molding Companies 

Plastek Industries, Inc.

Plastek Industries Inc. is headquartered in Erie, Pennsylvania, and is its largest manufacturing facility in the US. The worldwide employee strength is 1200, with 850 located in the US. It provides services like Molding/Assembly, Package Development, and Mold Design/Manufacturing.

The specialized verticals are Cosmetics, Consumer products, food & beverages, stock packaging, pharmaceutical, and personal care.

Business Address – 2425 W 23rd St, Erie, PA 16506

Jones Plastic & Engineering Co. LLC

This Louisville, Kentucky, manufacturer has 2400 employees, with 1310 in the US. The company provides services like Injection molding. Product development, tooling, value-added operations, and Paint & Hydrographics to verticals like Automobiles, Appliance, outdoor sports, household products, and power sport vehicles.

Business Address – 4500 Produce Rd, Louisville, KY 40218

LexaMar Corp.

The manufacturer is located in Boyne City, Michigan. It has 325 employees domestically and provides molding services to the automotive industry. It has a few of the largest automotive companies on the list of clientele.

Business Address – 100 Lexamar Dr, Boyne City, MI 49712

Ironwood Plastics, Inc.

This Ironwood, Michigan manufacturer creates molds for products with precise requirements. It has 210 employees and works on Hi-Tech engineering principles providing molding services like two-shot molding, pressure monitoring, laser scanning, reel-to-reel molding, overmolding, close tolerance molding, insert molding, and flow analysis.

Business Address – 1235 Wall St, Ironwood, MI 49938

American Tool & Mold, Inc.

American Toll & Mold Inc is a specialized custom mold manufacturing company supplying its mold to 21 countries. This Clearwater, Florida company has 180 employees. It creates various molds depending on the applications, like 8+8 stack mold, 32 cavity single face mold, 16 cavities unscrewing mold, 8 cavities unscrewing mold, and 2*2 Two material mold.

Business Address – 1700 Sunshine Dr, Clearwater, FL 33765

Hi-Tech Mold & Engineering, Inc.

Hi-Tech Mold & Engineering, Inc. is located in Rochester Hills, Michigan, with 175 employees. It provides molding services like machining, benching, polishing, tool assembly, additive manufacturing & 3D printing, and EDM. It specializes in catering to automotive, defense, aerospace, electric vehicles, medical devices, appliances, and recreational vehicles.

Business Address – 2775 Commerce Dr, Rochester Hills, MI 48309

Seaway Plastics Engineering, LLC

Seaway Plastics Engineering, LLC is a company specializing in low-volume production runs. It is located in Port Richey, Florida, and has 122 employees. The company can deliver low-volume production runs on time, on spec, and within your budget. The industries they serve are Defense, packaging, aerospace, transportation, food service, industrial electronics, and consumer products.

Business Address – 6006 Siesta Ln, Port Richey, FL 34668

Decatur Mold, Tool & Engineering, Inc.

Located in North Vernon, Indiana, the company has 110 employees and provides services like prototype tooling and tool design. It mainly produces components for the automotive, defense, and aerospace industries.

Business Address – 3330 N State Highway 7, North Vernon, IN 47265

MMI Engineered Solutions

Located in Saline, Michigan, MMI Engineered Solutions employs 86 people and parts from manufacturing injection molding components; it also provides services like designing, tooling, and material handling.

Business Address – 1715 Woodland Dr, Saline, MI 48176

Alwin Manufacturing Co Inc

This Clintonville, Wisconsin, manufacturer has 75 employees and offers design and product development services to create customized solutions. Some of its products include folded towel dispensers, napkin dispensers, toilet tissue dispensers, and roll towel dispensers.

Business Address – PO Box 10887, Green Bay, WI 54307


We have discussed plastic injection molding manufacturers. Now let’s get to some common injection molding queries.

What is Injection Molding?

Injection molding is a manufacturing process used to produce parts by injecting molten material into a mold cavity, where it cools and solidifies into the desired shape. It is commonly used to mass-produce products made of plastic, metal, and other materials.

What is the average cost of an injection mold?

A basic plastic injection mold with a single cavity is typically priced between $1,000 and $5,000. For more intricate and larger molds, the cost can exceed $80,000. The average cost for a mold that produces a straightforward part small enough to fit in your hand is around $12,000.

What is the strongest plastic for injection molding?

Polycarbonate is one of the most durable thermoplastic materials and is highly resistant to shattering, making it a popular choice for injection molding applications.

What is the demand for injection molding?

In 2022, the estimated size of the worldwide injection molding market was USD 261.8 billion, and it is expected to grow at a compounded annual growth rate (CAGR) of 4.8% from 2023 to 2030.

What is the limitation of injection molding?

One of the drawbacks of injection molding is that the cost of tooling and machinery can be high initially. This can make producing small runs of parts less cost-effective, especially if you only need a low volume of parts.

Final Thoughts 

That was all I had to say about the Top 10 Plastic Injection Molding Companies In the United States.

American companies hold the quality and precision for making world-class plastic molding products. So now there’s no need to outsource our supply chains somewhere else.

The plastic injection molding industry is a critical manufacturing sector in the US, with a wide range of applications in various industries.

The top injection molding companies in the country have been identified as leaders in their field, providing high-quality products, innovative solutions, and exceptional customer service.

These companies have demonstrated their expertise and commitment to excellence from medical devices and consumer goods to automotive and aerospace components.

As the demand for injection-molded products continues to grow, these companies are poised to maintain their position at the forefront of the industry, driving innovation and shaping the future of manufacturing.

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Have a wonderful day.

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