| | Claiborne County | MS | 28021 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ClaiborneCounty+MS |
| | Clarke County | MS | 28023 | | Meridian, MS 32940 | | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ClarkeCounty+MS |
| | Clay County | MS | 28025 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ClayCounty+Mississippi |
| | Coahoma County | MS | 28027 | | Clarksdale, MS 17260 | Memphis-Clarksdale-Forrest
City, TN-MS-AR 368 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CoahomaCounty+MS |
| | Copiah County | MS | 28029 | | Jackson, MS 27140 | Jackson-Vicksburg-Brookhaven,
MS 298 | Outlying | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=CopiahCounty+MS |
| | Covington County | MS | 28031 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CovingtonCounty+MS |
| | DeSoto County | MS | 28033 | | Memphis, TN-MS-AR 32820 | Memphis-Clarksdale-Forrest
City, TN-MS-AR 368 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=DeSotoCounty+MS |
| | Forrest County | MS | 28035 | | Hattiesburg, MS 25620 | Hattiesburg-Laurel, MS 279 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=ForrestCounty+MS |
| | Franklin County | MS | 28037 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FranklinCounty+MS |
| | George County | MS | 28039 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=GeorgeCounty+MS |