The Census counts 3 establishments in Williamson 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 Illinois capacity figures and treat the numbers here as context only.
Illinois overall: 1,619 establishments across the five classes, of which machine shops are the largest. Williamson County sits below the state's typical county for these classes.
Sourcing a part in Williamson County?
Capacity data says where the plants are. To find out what your part costs, send the part.