| | Lincoln County | MO | 29113 | | St. Louis, MO-IL 41180 | St. Louis-St.
Charles-Farmington, MO-IL 476 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=LincolnCounty+MO |
| | Linn County | MO | 29115 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=LinnCounty+MO |
| | Livingston County | MO | 29117 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=LivingstonCounty+MO |
| | Madison County | MO | 29123 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MadisonCounty+MO |
| | Marion County | MO | 29127 | | Hannibal, MO 25300 | Quincy-Hannibal, IL-MO 448 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MarionCounty+MO |
| | Miller County | MO | 29131 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MillerCounty+MO |
| | Moniteau County | MO | 29135 | | Jefferson City, MO 27620 | Columbia-Jefferson
City-Moberly, MO 190 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=MoniteauCounty+MO |
| | Montgomery County | MO | 29139 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MontgomeryCounty+MO |
| | Newton County | MO | 29145 | | Joplin, MO-KS 27900 | Joplin-Miami, MO-OK-KS 309 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=NewtonCounty+MO |
| | Oregon County | MO | 29149 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=OregonCounty+MO |