A toolroom is a room where tools are stored or, in a factory, a space where tools are made and repaired for use throughout the rest of the factory. In engineering and manufacturing, toolroom activity is everything related to tool-and-die facilities in contrast to production line activity.

Originally a toolroom was literally in one room, but like emergency room, the term has been figuratively extended in both substantive and adjectival senses to all such places and the methods used there, regardless of the physical space. The name was originally styled tool room or tool-room, but toolroom is now the norm in engineering and machining.