Top 17 Injection Molding Manufacturers in Illinois 2026

Component Plastics Inc

Elgin, Illinois

Component Plastics Inc. (CPI) has operated from Elgin, Illinois since its founding in 1969.

Fabrik Molded Plastics

McHenry, Illinois

Fabrik Molded Plastics was founded in 1980 in McHenry, Illinois, and has since provided engineered molding solutions to automotive, health care, electronics, consumer-industrial, and appliance markets. The company operates as a full-service custom injection molder with a focus on scientific processing methods.

Hansen Plastics Corporation

Elgin, Illinois

Hansen Plastics Corporation operates from Elgin, Illinois, where it was founded in 1971 by Elmer Hansen. The company transitioned to an Employee Stock Ownership Plan in 1991 and became fully employee-owned by 1998, a structure that remains central to its culture and decision-making.

Matrix Plastic Products

Wood Dale, Illinois

Matrix Plastic Products operates from Wood Dale, Illinois, just outside Chicago. The company traces its roots to 1978 when it began as Matrix Tooling with seven employees and a family tradition of moldmaking craftsmanship.

Rockford Molded Products Inc

Loves Park, Illinois

Rockford Molded Products began in 1943 when Henry "Hank" Gustafson and Norman Johnson opened a tool-and-die shop in a garage on 18th Avenue in Rockford, Illinois. The fledgling operation produced components for the U.S.

Wise Plastics

West Chicago, Illinois200+ employees

Wise Plastics Technologies, headquartered in St. Charles, Illinois, traces its roots to 1974 when it was founded as Wise‑Hamlin Plastics in the greater Chicagoland area.

AdvanTech Plastics

Woodstock, Illinois

AdvanTech Plastics operates from Woodstock, Illinois, where it has provided plastic injection molding services for over three decades. The company serves customers throughout the Chicago region, the broader Midwest, and across the United States, offering domestic manufacturing for organizations looking to reduce supply-chain risk.

Anfinsen Plastic Molding Inc.

Oswego, Illinois

Anfinsen Plastic Molding operates from Oswego, Illinois, where it was founded in 1935. The company began by molding small parts constrained by the technical limitations of the era and has since expanded into large-scale, complex-geometry molding alongside a full assembly warehouse that manages customer-supplied hardware, metal, custom packaging, and other polymer goods.

B J Plastic Molding Co Inc

Franklin Park, Illinois

B J Plastic Molding Co Inc operates from Franklin Park, Illinois, where it has manufactured rigid plastic boxes and containers since its founding in 1968. The company produces all of its products within its own U.S.

CBM Plastics, Inc.

Arthur, Illinois

CBM Plastics, Inc. was founded in 2001 in Arthur, Illinois, as a family-owned and operated business.