| | Adair County | KY | 21001 | | | | | not in metro; pop > 5K
< 20k;
non-metro-adjacent | farm-dependent | https://maps.google.com/?q=AdairCounty+KY |
| | Allen County | KY | 21003 | | Bowling Green, KY 14540 | Bowling
Green-Glasgow-Franklin,
KY 150 | Outlying | in metro of < 250k | farm-dependent | https://maps.google.com/?q=AllenCounty+KY |
| | Anderson County | KY | 21005 | | Frankfort, KY 23180 | Lexington-Fayette--Richmond--Frankfort,
KY 336 | Outlying | not in metro; pop > 5k
< 20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=AndersonCounty+KY |
| | Ballard County | KY | 21007 | | Paducah, KY-IL 37140 | Paducah-Mayfield, KY-IL 424 | Outlying | in metro of < 250k | manufacturing-dependent | https://maps.google.com/?q=BallardCounty+KY |
| | Barren County | KY | 21009 | | Glasgow, KY 23980 | Bowling
Green-Glasgow-Franklin,
KY 150 | Central | not in metro; pop > 5k
< 20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=BarrenCounty+KY |
| | Bath County | KY | 21011 | | Mount Sterling, KY 34460 | Lexington-Fayette--Richmond--Frankfort,
KY 336 | Outlying | not in metro; pop <
5k; metro-adjacent | farm-dependent | https://maps.google.com/?q=BathCounty+KY |
| | Bell County | KY | 21013 | | Middlesborough, KY 33180 | Middlesborough-Corbin, KY 371 | Central | not in metro; pop > 5K
< 20k;
non-metro-adjacent | mining-dependent | https://maps.google.com/?q=BellCounty+KY |
| | Boone County | KY | 21015 | | Cincinnati, OH-KY-IN 17140 | Cincinnati-Wilmington,
OH-KY-IN 178 | Central | in metro of > 1m | nonspecialized | https://maps.google.com/?q=BooneCounty+KY |
| | Bourbon County | KY | 21017 | | Lexington-Fayette, KY 30460 | Lexington-Fayette--Richmond--Frankfort,
KY 336 | Outlying | in metro of > 250k
< 1m | manufacturing-dependent | https://maps.google.com/?q=BourbonCounty+KY |
| | Boyd County | KY | 21019 | | Huntington-Ashland,
WV-KY-OH 26580 | Charleston-Huntington-Ashland,
WV-OH-KY 170 | Central | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=BoydCounty+KY |