The Census counts 4 establishments in Pennington 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 South Dakota capacity figures and treat the numbers here as context only.
South Dakota overall: 103 establishments across the five classes, of which machine shops are the largest. Pennington County sits below the state's typical county for these classes.
Sourcing a part in Pennington County?
Capacity data says where the plants are. To find out what your part costs, send the part.