The Census counts 24 establishments in Ontario 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 York capacity figures and treat the numbers here as context only.
New York overall: 1,130 establishments across the five classes, of which machine shops are the largest. Ontario County sits below the state's typical county for these classes.
Sourcing a part in Ontario County?
Capacity data says where the plants are. To find out what your part costs, send the part.