| | | Kenton County | KY | 21117 | | Cincinnati, OH-KY-IN 17140 | Cincinnati-Wilmington,
OH-KY-IN 178 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=KentonCounty+KY |
| | | Knox County | KY | 21121 | | Corbin, KY 18340 | Middlesborough-Corbin, KY 371 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=KnoxCounty+Kentucky |
| | | Laurel County | KY | 21125 | | Corbin, KY 18340 | Middlesborough-Corbin, KY 371 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=LaurelCounty+Kentucky |
| | | McCracken County | KY | 21145 | | Paducah, KY-IL 37140 | Paducah-Mayfield, KY-IL 424 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=McCrackenCounty+KY |
| | | Madison County | KY | 21151 | | Richmond-Berea, KY 40080 | Lexington-Fayette--Richmond--Frankfort,
KY 336 | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=MadisonCounty+KY |
| | | Montgomery County | KY | 21173 | | Mount Sterling, KY 34460 | Lexington-Fayette--Richmond--Frankfort,
KY 336 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MontgomeryCounty+KY |
| | | Oldham County | KY | 21185 | | Louisville/Jefferson
County, KY-IN 31140 | Louisville/Jefferson
County--Elizabethtown,
KY-IN 350 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=OldhamCounty+KY |
| | | Pike County | KY | 21195 | | Pikeville, KY 38210 | | Central | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=PikeCounty+KY |
| | | Pulaski County | KY | 21199 | | Somerset, KY 43700 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=PulaskiCounty+KY |
| | | Simpson County | KY | 21213 | | Franklin, KY 23190 | Bowling
Green-Glasgow-Franklin,
KY 150 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=SimpsonCounty+KY |
