| County | Pop. (2000) | Latest Visit | County Seat | Visited? | |
| Adair | 24,977 | 31-Jul-2003 | Kirksville | yes | |
| Andrew | 16,492 | 7-Aug-2005 | Savannah | ||
| Atchison | 6,430 | 11-Oct-2007 | Rock Port | yes | |
| Audrain | 25,853 | 24-Jul-2004 | Mexico | ||
| Barry | 34,010 | 14-Aug-2005 | Cassville | ||
| Barton | 12,541 | 14-Aug-2005 | Lamar | yes | |
| Bates | 16,653 | 14-Aug-2005 | Butler | ||
| Benton | 17,180 | 14-Aug-2005 | Warsaw | yes | |
| Bollinger | 12,029 | 16-Aug-2008 | Marble Hill | yes | |
| Boone | 135,454 | 20-Aug-2005 | Columbia | yes | |
| Buchanan | 85,998 | 7-Aug-2006 | St. Joseph | yes | Butler | 40,867 | 10-Aug-2008 | Poplar Bluff | yes | Caldwell | 8,969 | 7-Aug-2006 | Kingston | yes |
| Callaway | 40,766 | 20-Aug-2005 | Fulton | ||
| Camden | 37,051 | 20-Aug-2005 | Camdenton | yes | |
| Cape Girardeau | 68,693 | 16-Aug-2008 | Jackson | yes | |
| Carroll | 10,285 | 7-Aug-2005 | Carrollton | yes | |
| Carter | 5,941 | 10-Aug-2008 | Van Buren | ||
| Cass | 82,092 | 14-Aug-2005 | Harrisonville | yes | |
| Cedar | 13,733 | 20-Aug-2005 | Stockton | yes | |
| Chariton | 8,438 | 24-Jul-2004 | Keytesville | yes | Christian | 54,285 | 14-Aug-2005 | Ozark | yes |
| Clark | 7,416 | 31-Jul-2003 | Kahoka | ||
| Clay | 184,006 | 6-Aug-2006 | Liberty | yes | |
| Clinton | 18,979 | 13-Aug-2005 | Plattsburg | ||
| Cole | 71,397 | 5-Aug-2006 | Jefferson City | yes | |
| Cooper | 16,670 | 7-Aug-2005 | Boonville | yes | |
| Crawford | 22,804 | 18-Aug-1995 | Steelville | ||
| Dade | 7,923 | 14-Aug-2005 | Greenfield | yes | |
| Dallas | 15,661 | 14-Aug-2005 | Buffalo | yes | |
| Daviess | 8,016 | 7-Aug-2005 | Gallatin | yes | |
| DeKalb | 11,597 | 7-Aug-2006 | Maysville | yes | |
| Dent | 14,927 | 5-Aug-2006 | Salem | yes | |
| Douglas | 13,084 | 10-Aug-2008 | Ava | yes | |
| Dunklin | 33,155 | 8-Aug-2007 | Kennett | ||
| Franklin | 93,807 | 18-Aug-1995 | Union | ||
| Gasconade | 15,342 | 18-Aug-1992 | Hermann | ||
| Gentry | 6,861 | 13-Aug-2005 | Albany | ||
| Greene | 240,391 | 14-Aug-2005 | Springfield | yes | |
| Grundy | 10,432 | 7-Aug-2005 | Trenton | yes | |
| Harrison | 8,850 | 31-Jul-2003 | Bethany | ||
| Henry | 21,997 | 14-Aug-2005 | Clinton | yes | |
| Hickory | 8,940 | 20-Aug-2005 | Hermitage | yes | |
| Holt | 5,351 | 7-Aug-2005 | Oregon | ||
| Howard | 10,212 | 24-Jul-2004 | Fayette | yes | |
| Howell | 37,238 | 10-Aug-2008 | West Plains | ||
| Iron | 10,697 | 5-Aug-2006 | Ironton | ||
| Jackson | 654,880 | 6-Aug-2006 | Independence | yes | |
| Jasper | 104,686 | 15-Aug-2005 | Carthage | yes | |
| Jefferson | 198,099 | 16-Aug-2008 | Hillsboro | ||
| Johnson | 48,258 | 7-Aug-2006 | Warrensburg | yes | |
| Knox | 4,361 | 31-Jul-2003 | Edina | ||
| Laclede | 32,513 | 18-Aug-1995 | Lebanon | yes | |
| Lafayette | 32,960 | 7-Aug-2005 | Lexington | ||
| Lawrence | 35,204 | 14-Aug-2005 | Mount Vernon | ||
| Lewis | 10,494 | 31-Jul-2003 | Monticello | ||
| Lincoln | 38,944 | 24-Jul-2004 | Troy | yes | |
| Linn | 13,754 | 7-Aug-2006 | Linneus | ||
| Livingston | 14,558 | 7-Aug-2006 | Chillicothe | yes | |
| McDonald | 21,681 | 15-Aug-2005 | Pineville | yes | |
| Macon | 15,762 | 7-Aug-2006 | Macon | yes | |
| Madison | 11,800 | 10-Aug-2008 | Fredericktown | yes | |
| Maries | 8,903 | 5-Aug-2006 | Vienna | yes | |
| Marion | 28,289 | 7-Aug-2006 | Palmyra | ||
| Mercer | 3,757 | 31-Jul-2003 | Princeton | yes | |
| Miller | 23,564 | 20-Aug-2005 | Tuscumbia | ||
| Mississippi | 13,427 | 16-Aug-2008 | Charleston | yes | |
| Moniteau | 14,827 | 5-Aug-2006 | California | yes | |
| Monroe | 9,311 | 24-Jul-2004 | Paris | yes | |
| Montgomery | 12,136 | 20-Aug-2005 | Montgomery City | ||
| Morgan | 19,309 | 7-Aug-2006 | Versailles | ||
| New Madrid | 19,760 | 16-Aug-2008 | New Madrid | yes | |
| Newton | 52,636 | 15-Aug-2005 | Neosho | ||
| Nodaway | 21,912 | 13-Aug-2005 | Maryville | yes | |
| Oregon | 10,344 | 10-Aug-2008 | Alton | ||
| Osage | 13,062 | 5-Aug-2006 | Linn | yes | |
| Ozark | 9,542 | 10-Aug-2008 | Gainesville | yes | |
| Pemiscot | 20,047 | 16-Aug-2008 | Caruthersville | yes | |
| Perry | 18,132 | 16-Aug-2008 | Perryville | yes | |
| Pettis | 39,403 | 5-Aug-2006 | Sedalia | yes | |
| Phelps | 39,825 | 5-Aug-2006 | Rolla | yes | |
| Pike | 18,351 | 24-Jul-2004 | Bowling Green | yes | |
| Platte | 73,781 | 6-Aug-2006 | Platte City | yes | |
| Polk | 26,992 | 14-Aug-2005 | Bolivar | yes | |
| Pulaski | 41,165 | 18-Aug-1995 | Waynesville | yes | |
| Putnam | 5,223 | 31-Jul-2003 | Unionville | yes | |
| Ralls | 9,626 | 7-Aug-2006 | New London | ||
| Randolph | 24,663 | 24-Jul-2004 | Huntsville | ||
| Ray | 23,354 | 7-Aug-2005 | Richmond | yes | |
| Reynolds | 6,689 | 10-Aug-2008 | Centerville | ||
| Ripley | 13,509 | 10-Aug-2008 | Doniphan | ||
| St. Charles | 283,883 | 16-Aug-2008 | St. Charles | yes | |
| St. Clair | 9,652 | 20-Aug-2005 | Osceola | ||
| Ste. Genevieve | 17,842 | 16-Aug-2008 | Ste. Genevieve | ||
| St. Francois | 55,641 | 10-Aug-2008 | Farmington | yes | |
| St. Louis | 1,016,315 | 16-Aug-2008 | Clayton | ||
| Saline | 23,756 | 7-Aug-2005 | Marshall | yes | |
| Schuyler | 4,170 | 31-Jul-2003 | Lancaster | ||
| Scotland | 4,983 | 31-Jul-2003 | Memphis | ||
| Scott | 40,422 | 16-Aug-2008 | Benton | ||
| Shannon | 8,324 | 10-Aug-2008 | Eminence | yes | |
| Shelby | 6,799 | 7-Aug-2006 | Shelbyville | ||
| Stoddard | 29,705 | 16-Aug-2008 | Bloomfield | ||
| Stone | 28,658 | 14-Aug-2005 | Galena | ||
| Sullivan | 7,219 | 31-Jul-2003 | Milan | ||
| Taney | 39,703 | 12-Aug-2005 | Forsyth | ||
| Texas | 23,003 | 10-Aug-2008 | Houston | ||
| Vernon | 20,454 | 20-Aug-2005 | Nevada | yes | |
| Warren | 24,525 | 21-Aug-2005 | Warrenton | yes | |
| Washington | 23,344 | 5-Aug-2006 | Potosi | Wayne | 13,259 | 10-Aug-2008 | Greenville | yes |
| Webster | 31,045 | 18-Aug-1995 | Marshfield | yes | |
| Worth | 2,382 | 13-Aug-2005 | Grant City | ||
| Wright | 17,955 | 10-Aug-2008 | Hartville | ||
| Independent City (included in totals) | |||||
| St. Louis | 348,189 | 9-Aug-2008 | |||