| County | Pop. (2010) | Latest Visit | County Seat | Visited? | |
| Adair | 25,607 | 31-Jul-2003 | Kirksville | yes | |
| Andrew | 17,291 | 1-Sep-2011 | Savannah | ||
| Atchison | 5,685 | 1-Sep-2011 | Rock Port | yes | |
| Audrain | 25,529 | 24-Jul-2004 | Mexico | ||
| Barry | 35,597 | 14-Aug-2005 | Cassville | ||
| Barton | 12,402 | 3-Sep-2011 | Lamar | yes | |
| Bates | 17,049 | 3-Sep-2011 | Butler | yes | |
| Benton | 19,056 | 14-Aug-2005 | Warsaw | yes | |
| Bollinger | 12,363 | 16-Aug-2008 | Marble Hill | yes | |
| Boone | 162,642 | 20-Aug-2005 | Columbia | yes | |
| Buchanan | 89,201 | 1-Sep-2011 | St. Joseph | yes | |
| Butler | 42,794 | 10-Aug-2008 | Poplar Bluff | yes | |
| Caldwell | 9,424 | 7-Aug-2006 | Kingston | yes | |
| Callaway | 44,332 | 20-Aug-2005 | Fulton | ||
| Camden | 44,002 | 20-Aug-2005 | Camdenton | yes | |
| Cape Girardeau | 75,674 | 16-Aug-2008 | Jackson | yes | |
| Carroll | 9,295 | 7-Aug-2005 | Carrollton | yes | |
| Carter | 6,265 | 10-Aug-2008 | Van Buren | ||
| Cass | 99,478 | 3-Sep-2011 | Harrisonville | yes | |
| Cedar | 13,982 | 20-Aug-2005 | Stockton | yes | |
| Chariton | 7,831 | 24-Jul-2004 | Keytesville | yes | |
| Christian | 77,422 | 14-Aug-2005 | Ozark | yes | |
| Clark | 7,139 | 31-Jul-2003 | Kahoka | ||
| Clay | 221,939 | 4-Sep-2011 | Liberty | yes | |
| Clinton | 20,743 | 4-Sep-2011 | Plattsburg | ||
| Cole | 75,990 | 5-Aug-2006 | Jefferson City | yes | |
| Cooper | 17,601 | 7-Aug-2005 | Boonville | yes | |
| Crawford | 24,696 | 18-Aug-1995 | Steelville | ||
| Dade | 7,883 | 14-Aug-2005 | Greenfield | yes | |
| Dallas | 16,777 | 14-Aug-2005 | Buffalo | yes | |
| Daviess | 8,433 | 4-Sep-2011 | Gallatin | yes | |
| DeKalb | 12,892 | 4-Sep-2011 | Maysville | yes | |
| Dent | 15,657 | 5-Aug-2006 | Salem | yes | |
| Douglas | 13,684 | 10-Aug-2008 | Ava | yes | |
| Dunklin | 31,953 | 8-Aug-2007 | Kennett | ||
| Franklin | 101,492 | 18-Aug-1995 | Union | ||
| Gasconade | 15,222 | 18-Aug-1992 | Hermann | ||
| Gentry | 6,738 | 13-Aug-2005 | Albany | ||
| Greene | 275,174 | 14-Aug-2005 | Springfield | yes | |
| Grundy | 10,261 | 7-Aug-2005 | Trenton | yes | |
| Harrison | 8,957 | 4-Sep-2011 | Bethany | ||
| Henry | 22,272 | 14-Aug-2005 | Clinton | yes | |
| Hickory | 9,627 | 20-Aug-2005 | Hermitage | yes | |
| Holt | 4,912 | 1-Sep-2011 | Oregon | ||
| Howard | 10,144 | 24-Jul-2004 | Fayette | yes | |
| Howell | 40,400 | 10-Aug-2008 | West Plains | ||
| Iron | 10,630 | 5-Aug-2006 | Ironton | ||
| Jackson | 674,158 | 4-Sep-2011 | Independence | yes | |
| Jasper | 117,404 | 3-Sep-2011 | Carthage | yes | |
| Jefferson | 218,733 | 16-Aug-2008 | Hillsboro | ||
| Johnson | 52,595 | 5-Aug-2006 | Warrensburg | yes | |
| Knox | 4,131 | 31-Jul-2003 | Edina | ||
| Laclede | 35,571 | 18-Aug-1995 | Lebanon | yes | |
| Lafayette | 33,381 | 7-Aug-2005 | Lexington | ||
| Lawrence | 38,634 | 14-Aug-2005 | Mount Vernon | yes | |
| Lewis | 10,211 | 31-Jul-2003 | Monticello | ||
| Lincoln | 52,566 | 24-Jul-2004 | Troy | yes | |
| Linn | 12,761 | 7-Aug-2006 | Linneus | ||
| Livingston | 15,195 | 7-Aug-2006 | Chillicothe | yes | |
| McDonald | 15,566 | 15-Aug-2005 | Pineville | yes | |
| Macon | 12,226 | 7-Aug-2006 | Macon | yes | |
| Madison | 9,176 | 10-Aug-2008 | Fredericktown | yes | |
| Maries | 28,781 | 5-Aug-2006 | Vienna | yes | |
| Marion | 23,083 | 7-Aug-2006 | Palmyra | ||
| Mercer | 3,785 | 31-Jul-2003 | Princeton | yes | |
| Miller | 24,748 | 20-Aug-2005 | Tuscumbia | ||
| Mississippi | 14,358 | 16-Aug-2008 | Charleston | yes | |
| Moniteau | 15,607 | 5-Aug-2006 | California | yes | |
| Monroe | 8,840 | 24-Jul-2004 | Paris | yes | |
| Montgomery | 12,236 | 20-Aug-2005 | Montgomery City | ||
| Morgan | 20,565 | 5-Aug-2006 | Versailles | ||
| New Madrid | 18,956 | 16-Aug-2008 | New Madrid | yes | |
| Newton | 58,114 | 3-Sep-2011 | Neosho | ||
| Nodaway | 23,370 | 13-Aug-2005 | Maryville | yes | |
| Oregon | 10,881 | 10-Aug-2008 | Alton | ||
| Osage | 13,878 | 5-Aug-2006 | Linn | yes | |
| Ozark | 9,723 | 10-Aug-2008 | Gainesville | yes | |
| Pemiscot | 18,296 | 16-Aug-2008 | Caruthersville | ||
| Perry | 18,971 | 16-Aug-2008 | Perryville | yes | |
| Pettis | 42,201 | 5-Aug-2006 | Sedalia | yes | |
| Phelps | 45,156 | 5-Aug-2006 | Rolla | yes | |
| Pike | 18,516 | 24-Jul-2004 | Bowling Green | yes | |
| Platte | 89,322 | 5-Sep-2011 | Platte City | yes | |
| Polk | 31,137 | 14-Aug-2005 | Bolivar | yes | |
| Pulaski | 52,274 | 18-Aug-1995 | Waynesville | yes | |
| Putnam | 4,979 | 31-Jul-2003 | Unionville | yes | |
| Ralls | 10,167 | 7-Aug-2006 | New London | ||
| Randolph | 25,414 | 24-Jul-2004 | Huntsville | ||
| Ray | 23,494 | 7-Aug-2005 | Richmond | yes | |
| Reynolds | 6,696 | 10-Aug-2008 | Centerville | ||
| Ripley | 14,100 | 10-Aug-2008 | Doniphan | yes | |
| St. Charles | 360,485 | 16-Aug-2008 | St. Charles | yes | |
| St. Clair | 9,805 | 20-Aug-2005 | Osceola | ||
| Ste. Genevieve | 18,145 | 16-Aug-2008 | Ste. Genevieve | ||
| St. Francois | 65,359 | 10-Aug-2008 | Farmington | yes | |
| St. Louis | 998,954 | 17-Aug-2008 | Clayton | ||
| Saline | 23,370 | 7-Aug-2005 | Marshall | yes | |
| Schuyler | 4,431 | 31-Jul-2003 | Lancaster | ||
| Scotland | 4,843 | 31-Jul-2003 | Memphis | ||
| Scott | 39,191 | 16-Aug-2008 | Benton | ||
| Shannon | 8,441 | 10-Aug-2008 | Eminence | yes | |
| Shelby | 6,373 | 7-Aug-2006 | Shelbyville | ||
| Stoddard | 29,968 | 16-Aug-2008 | Bloomfield | ||
| Stone | 32,202 | 14-Aug-2005 | Galena | ||
| Sullivan | 6,714 | 31-Jul-2003 | Milan | ||
| Taney | 51,675 | 14-Aug-2005 | Forsyth | ||
| Texas | 26,008 | 10-Aug-2008 | Houston | ||
| Vernon | 21,159 | 3-Sep-2011 | Nevada | yes | |
| Warren | 32,513 | 21-Aug-2005 | Warrenton | yes | |
| Washington | 25,195 | 5-Aug-2006 | Potosi | ||
| Wayne | 13,521 | 10-Aug-2008 | Greenville | yes | |
| Webster | 36,202 | 18-Aug-1995 | Marshfield | yes | |
| Worth | 2,171 | 13-Aug-2005 | Grant City | yes | |
| Wright | 18,815 | 10-Aug-2008 | Hartville | ||
| Independent City (included in totals) | |||||
| St. Louis | 319,294 | 9-Aug-2008 | |||