| | | Caldwell County | KY | 21033 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CaldwellCounty+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 |
| | | 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 |
| | | 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 |
| | | Estill County | KY | 21065 | | Richmond-Berea, KY 40080 | Lexington-Fayette--Richmond--Frankfort,
KY 336 | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=EstillCounty+KY |
| | | Fulton County | KY | 21075 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FultonCounty+Kentucky |
| | | Garrard County | KY | 21079 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=GarrardCounty+KY |
| | | Grant County | KY | 21081 | | Cincinnati, OH-KY-IN 17140 | Cincinnati-Wilmington,
OH-KY-IN 178 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=GrantCounty+KY |
