The Master Lock Company
ManufacturingIllinois, United States501-1000 Employees
The Master Lock Company is a manufacturing business located at 1 Horizon Way, Deerfield, Illinois 60015, United States. It employs between 501 and 1000 people. With a history spanning more than a century, the company is recognized worldwide as a leading name in padlocks and security products. The company provides a broad range of security products, safes, and safety solutions for consumer, commercial, and industrial end-users. In 2024 the company relocated its operations from Oak Creek, Wisconsin to Deerfield, Illinois, and in 2025 it introduced electronic and connected locks for commercial applications while pursuing partnerships and industry engagement, including with Bank Trailer Security Systems LLC and CECOR.net, and participating in ISC West 2025.