The Census counts 9 establishments in Warren County across the classes this site tracks.
This is a small published count: with fewer than 30 establishments, county figures say little about local supply, so lean on the New Jersey capacity figures and treat the numbers here as context only.
New Jersey overall: 624 establishments across the five classes, of which machine shops are the largest. Warren County sits below the state's typical county for these classes.
Sourcing a part in Warren County?
Capacity data says where the plants are. To find out what your part costs, send the part.