These Ohio-based companies specialize in plastics manufacturing, encompassing a range of activities from material development to finished product fabrication. The list includes established firms, many founded mid-20th century, indicating a mature industrial sector.
Key companies include Avient Corporation, which develops and supplies colorants and engineered materials; PLASKOLITE, a manufacturer of acrylic and polycarbonate sheets; Americhem, providing custom color masterbatch and functional additives; and Myers Industries, a producer of polymer products. A notable pattern is the concentration of headquarters in northeastern Ohio, particularly around the Cleveland metropolitan area.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Avient Corporationavient.com
Development and supply of colorants, composites, additives, engineered materials, and Dyneema庐 fibers for sustainable, high-performance customer products. |
4,204 | |||
| 2 |
Saint-Gobain Performance Plasticssaint-gobain.com
Leading producer of engineered high-performance polymer products serving diverse industries worldwide with innovation, expertise, and comprehensive customer support. |
1,932 | |||
| 3 |
PLASKOLITEplaskolite.com
Leading manufacturer of acrylic sheet, polycarbonate sheet, and other thermoplastic solutions for various applications with a focus on quality and customer service |
665 | |||
| 4 |
OMNOVAomnova.com
Development and supply of functional and decorative surfaces enhancing aesthetics and performance for various global brand-name end-use products. |
577 | |||
| 5 |
Americhemamerichem.com
Global manufacturer providing custom color masterbatch, functional additives, and engineered compounds through technical collaboration, laboratory testing, and on-site process simulation for polymer optimization. |
549 | |||
| 6 |
Myers Industriesmyersindustries.com
A leading manufacturer of polymer products for various markets, distributing tools and supplies for the tire industry, with a diverse product portfolio |
548 | |||
| 7 |
Molded Fiber Glass (MFG) Companiesmoldedfiberglass.com
A leading composites specialist with 70 years of experience in providing innovative solutions, material development, and manufacturing services across North America |
530 | |||
| 8 |
Core Molding Technologiescoremt.com
Specializing in molded structural products for building, utilities, transportation, and powersports industries across North America with a wide range of manufacturing processes |
449 | |||
| 9 |
Geon Performance Solutionsgeon.com
Global leader in formulating, developing, and manufacturing performance polymer solutions with a portfolio of vinyl and polyolefin technologies, serving 1,200+ customers worldwide |
410 | |||
| 10 |
Advanced Compositesadvcmp.com
A leading supplier of TPOs and Polypropylene Compounds for the North American Automotive Industry, dedicated to providing innovative products and reducing costs |
369 | |||
| 11 |
FMTkreate.com
A strategic partner for high-quality plastic parts manufacturing, offering services including engineering, 3D printing, injection molding, and tooling solutions |
348 | |||
| 12 |
Spartech Corporationavient.com
Innovative polymer solutions provider offering sustainable packaging and sheet solutions for various industries, with a focus on creative design and package engineering |
338 | |||
| 13 |
EG Industries | Leader in Plastic Injection Molding, Tooling, and Automationegindustries.com
Established in 1981, the company is a Tier 1 supplier to automotive, consumer, and industrial markets, offering plastic injection molding, tooling, assembly, coatings, and decorative technology services |
315 | |||
| 14 | 252 | ||||
| 15 |
Multi-Plastics, Inc.multi-plastics.com
Global supplier of thin gauge plastic films for various industries, operating multiple distribution facilities and extrusion operations to provide quick lead times and exceptional service |
174 | |||
| 16 |
Engineered Profiles LLCengineeredprofiles.com
A leading manufacturer of custom plastic profile extrusions with in-house tooling capabilities, specializing in a variety of thermoplastic materials for diverse industries |
173 | |||
| 17 |
Royal Plastics, Inc.royalplastics.com
An innovative custom injection molder with global capabilities in manufacturing complex parts, offering design, assembly, finishing, and cost reduction services |
115 | |||
| 18 |
Ridge Corporationridgecorp.com
Central Ohio based engineering firm specializing in advanced composites for various industries, offering resilient lightweight materials and custom engineered solutions |
106 | |||
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| 19 |
Thogus Products Companythogus.com
Established family-owned plastic injection molder offering value-added manufacturing services with a customer-first focus, emphasizing lasting partnerships and manufacturing excellence with White Glove Service |
66 | |||
| 20 |
B & B Molded Productsbbmolded.com
This custom plastic injection molding company focuses on precision products, process improvements, and quality control for various industries |
57 | |||
| 21 |
Technoform North Americatechnoform.com
Global leader in designing, producing, and distributing high-performance insulating glass spacers and thermal struts to enhance window energy efficiency |
53 | |||
| 22 |
Pexco Custom & Specialty Plasticspexco.com
Specializing in designing and manufacturing injection molded parts with ultra-high-performance plastics for critical applications in aerospace, defense, medical, and energy industries |
42 | |||
| 23 |
Schnipke Precision Moldingschnipke.com
A top manufacturer of plastic injection molded components, offering value-added solutions, high-quality products, and cost-effective manufacturing techniques to industrial and consumer markets |
40 | |||
| 24 |
Proto Plastics, Inc.protoplastics.com
Full-service contract manufacturer specializing in custom plastic injection molding parts and assemblies for various industries, with a focus on precision and quality |
32 | |||
| 25 |
JACO Manufacturing Companyjacomfg.com
The company is a full-service supplier of specialized design tooling and manufacturer of small, high-quality plastic parts, including custom molded products and compression fittings |
26 | |||
| 26 |
Midwest Molding Inc.midwest-molding.com
A leading injection molding company with ISO 9001 certification, offering custom plastic parts for various industries with high precision and state-of-the-art technology |
22 | |||
| 27 |
Quality Plastics LLCqualityplasticsllc.com
Specializing in custom injection molding, assembly solutions, product development, prototyping, additive manufacturing, and 3D printing services for various industries |
22 | |||
| 28 |
Replex Plasticsreplex.com
Manufacturing optical plastic products for industrial customers in 14 countries, including mirrors, acrylic and polycarbonate domes for various applications Offering engineering, manufacturing, and testing services |
18 | |||
| 29 |
Akro-Plasticsrotomold.net
A leading provider of high-quality rotational molded plastic products, offering customization services and support from design to distribution |
17 | |||
| 30 |
KLW Plasticsklwplastics.com
The company specializes in manufacturing industrial packaging solutions that are sustainable, environmentally friendly, and meet UN standards for various industries |
13 | |||
| 31 | 
PRIME POLYMERS, INC.primepolymers.com
A plastics company located in Ohio, specializing in the production and distribution of polymer products |
11 | |||
| 32 |
Ohio Rotational Molding, LLC
Specializing in manufacturing high-quality rotationally molded plastic products, offering services such as CNC machining, finishing, assembly, 3D printing, and more in western Ohio |
10 | |||
| 33 |
Extrudex Limited Partnershipextrudex.net
Extrudex specializes in premium thermoplastic extrusions, offering custom fabrication, finishing, and assembly services for a variety of industries |
9 | |||
| 34 |
Vertex, Incvertexseals.com
A premier manufacturer of designed elastomeric seals and custom rubber extrusions, with a focus on quality, technology, and customer satisfaction |
9 | |||
| 35 |
Miles Productsmilesproducts.com
Custom thermoplastic molding company offering insert molding, injection molding, and structural foam molding services with a network of top manufacturing companies and ISO registered facilities |
3 | |||
| 36 |
Laird Plastics Columbuslairdplastics.com
A leading distributor of plastic sheets, rods, and films serving industries such as military, construction, aerospace, and more with a focus on honesty and continuous improvement |
3 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.
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The same list elsewhere in United States
- Plastics Manufacturing companies in the United States 410
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- Plastics Manufacturing companies in California 25