Injection Molding Companies in the United States

From automotive and aerospace to consumer goods and medical devices, injection molding remains one of the most essential contract manufacturing services in the U.S. RFQ USA showcases a vetted directory of high-quality plastic injection molding companies that serve businesses nationwide. Whether you’re developing a prototype, scaling production, or seeking a cleanroom-capable partner, our platform connects you with experienced molders ready to quote your job.

The companies listed here are reviewed for their equipment capabilities, industry certifications, and manufacturing experience. Many also support value-added services like consulting, mold design, and overmolding, giving you access to end-to-end solutions under one roof.

ISO Certified and ITAR Registered Injection Molding Services

Working with critical industries requires more than standard quality; it demands certified processes and compliance. That’s why many RFQ USA member companies hold ISO 9001:2015, ISO 13485, and ISO Class 8 Cleanroom certifications. Some also maintain IATF 16949 credentials for automotive industry compliance and ITAR registration for defense and government contract work.

When your project involves regulated markets or precise tolerances, these certifications provide peace of mind. RFQ USA’s advanced search and filtering tools allow you to browse companies by certification, making it easy to find the right fit for your requirements.

Custom Plastic Molding, Low-Mid Volume Runs, and Specialty Materials

Whether you’re molding a few hundred parts or scaling into thousands, our members are equipped to deliver low-to-mid volume injection molding services with consistency and speed. Materials include polycarbonate, ABS, nylon, acetal, polyethylene, proprietary resins, and many more, with molding capabilities ranging from single-digit tonnage up to several hundred tons.

You’ll find custom injection molding specialists for applications in consumer products, aerospace components, electronics housings, medical device enclosures, pet food packaging, and more.

Cleanroom Molding and Food-Safe Applications

Some of our listed partners operate ISO Class 8 Cleanroom environments suitable for sensitive manufacturing applications such as medical parts, electronics, and packaging components. Cleanroom-compliant injection molding is an increasingly important capability for OEMs focused on contamination control and traceability.

In addition, you’ll find companies offering food technology injection molding, an emerging space where plastic components play a key role in the packaging and delivery of products in sectors like pet food, dietary supplements, and food-grade storage systems.

ASTM and ISO Test Specimen Molding, Mold Sampling, and Consulting

Specialized services available through RFQ USA include test specimen molding, such as ASTM and ISO test bars, flex/izod bars, tensile bars, plaques, and disks. These are frequently used for material certification, performance validation, and lab analysis. Our members also support mold sampling, short-run trial runs, and full-scope injection molding consulting to help optimize your design for manufacturability.

If your team is in the early stages of product development, these services can help refine your process and reduce cost over the full production lifecycle.

Browse the Best Injection Molding Companies in the U.S.

At RFQ USA, we aim to connect sourcing professionals, engineers, and buyers with trusted American injection molders who can deliver fast quotes and reliable results. Our national database of vetted providers is searchable by material type, production scale, industry certification, and company attributes such as veteran-owned or women-owned status.

This platform was built to simplify the quote process for real-world manufacturing needs, from startups bringing new products to market to Fortune 500 OEMs seeking domestic production support.

Explore RFQ USA Without an Account

You don’t need to register to search the RFQ USA directory or contact suppliers. Our open-access approach means anyone can take advantage of the platform to source reliable injection molding partners. When you’re ready, U.S.-based companies can apply to be listed in the directory, but there’s no obligation to create an account to get started.

Try out the filters, explore certified partners, and discover the value of working with a national network of thoroughly vetted American manufacturers. If your company offers injection molding services and is ready to get found, we invite you to apply for a listing today.