Founded in Rochester in 1945 with a first molding job making clothespins, Ontario Plastics of NY is a custom plastic injection molder serving customers in fields ranging from medical products to aerospace and defense. The company grew through three generations of Hayes family ownership before transitioning to a fourth-generation owner in 2024, and it remains known for combining in-house engineering, tooling, and production support with a practical “save the day” approach to customer needs. Ontario Plastics has held ISO 9001 certification since 2001 and was recertified to ISO 9001:2015 in 2016.
ISO 9001:2015
certification