| | | Carroll County | KY | 21041 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=CarrollCounty+KY |
| | | Carter County | KY | 21043 | | Huntington-Ashland,
WV-KY-OH 26580 | Charleston-Huntington-Ashland,
WV-OH-KY 170 | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CarterCounty+KY |
| | | Casey County | KY | 21045 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CaseyCounty+KY |
| | | Christian County | KY | 21047 | | Clarksville, TN-KY 17300 | | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=ChristianCounty+KY |
| | | Clark County | KY | 21049 | | Lexington-Fayette, KY 30460 | Lexington-Fayette--Richmond--Frankfort,
KY 336 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=ClarkCounty+KY |
| | | Clay County | KY | 21051 | | Corbin, KY 18340 | Middlesborough-Corbin, KY 371 | Outlying | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=ClayCounty+KY |
| | | Clinton County | KY | 21053 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=ClintonCounty+KY |
| | | Crittenden County | KY | 21055 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CrittendenCounty+KY |
| | | Cumberland County | KY | 21057 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CumberlandCounty+KY |
| | | Daviess County | KY | 21059 | | Owensboro, KY 36980 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=DaviessCounty+KY |
