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Facts about Jefferson County
| County | Jefferson |
| State | Missouri |
| Country | USA |
| Population – 2015 | 224,124 |
More Maps of Jefferson County
Covering an area of 2,183 square miles, Jefferson County is located in the Puget Sound region of the United States. Port Townsend is the county seat as well as the only incorporated city in Jefferson County. Established on December 22, 1852, the county is named after Thomas Jefferson, the third President of the US.
The Eastern portion of the county lies along the Strait of Juan de Fuca and Puget Sound. Its central, mountainous region, which remains largely uninhabited, lies mostly within Olympic National Park and the Olympic Peninsula. Western Jefferson County features small census towns along the Pacific Ocean.
The famous Hood Canal Bridge links the county with Kitsap County. U.S. Route 101, SR 20, and SR 104 are primary roads in the county. Port Townsend, a quaint Victorian seaport, is noted for many Victorian buildings in its Historic District.
MOW.DT.12.9.16
List of Counties in Missouri
| County Name | County Seat/Capital | State | 2010 pop. | Area-km | Area-mi |
|---|---|---|---|---|---|
| Adair | Kirksville | Missouri | 25,607 | 1,469 | 567 |
| Andrew | Savannah | Missouri | 17,291 | 1,121 | 433 |
| Atchison | Rock Port | Missouri | 5,685 | 1,418 | 547 |
| Audrain | Mexico | Missouri | 25,529 | 1,793 | 692 |
| Barry | Cassville | Missouri | 35,597 | 2,016 | 778 |
| Barton | Lamar | Missouri | 12,402 | 1,533 | 592 |
| Bates | Butler | Missouri | 17,049 | 2,167 | 837 |
| Benton | Warsaw | Missouri | 19,056 | 1,824 | 704 |
| Bollinger | Marble Hill | Missouri | 12,363 | 1,600 | 618 |
| Boone | Columbia | Missouri | 1,62,642 | 1,775 | 685 |
| Buchanan | Saint Joseph | Missouri | 89,201 | 1,057 | 408 |
| Butler | Poplar Bluff | Missouri | 42,794 | 1,799 | 695 |
| Caldwell | Kingston | Missouri | 9,424 | 1,104 | 426 |
| Callaway | Fulton | Missouri | 44,332 | 2,162 | 835 |
| Camden | Camdenton | Missouri | 44,002 | 1,699 | 656 |
| Cape Girardeau | Jackson | Missouri | 75,674 | 1,498 | 579 |
| Carroll | Carrollton | Missouri | 9,295 | 1,799 | 695 |
| Carter | Van Buren | Missouri | 6,265 | 1,314 | 507 |
| Cass | Harrisonville | Missouri | 99,478 | 1,805 | 697 |
| Cedar | Stockton | Missouri | 13,982 | 1,229 | 474 |
| Chariton | Keytesville | Missouri | 7,831 | 1,946 | 751 |
| Christian | Ozark | Missouri | 77,422 | 1,457 | 563 |
| Clark | Kahoka | Missouri | 7,139 | 1,307 | 505 |
| Clay | Liberty | Missouri | 2,21,939 | 1,029 | 397 |
| Clinton | Plattsburg | Missouri | 20,743 | 1,085 | 419 |
| Cole | Jefferson City | Missouri | 75,990 | 1,020 | 394 |
| Cooper | Boonville | Missouri | 17,601 | 1,463 | 565 |
| Crawford | Steelville | Missouri | 24,696 | 1,923 | 743 |
| Dade | Greenfield | Missouri | 7,883 | 1,269 | 490 |
| Dallas | Buffalo | Missouri | 16,777 | 1,401 | 541 |
| Daviess | Gallatin | Missouri | 8,433 | 1,459 | 563 |
| DeKalb | Maysville | Missouri | 12,892 | 1,091 | 421 |
| Dent | Salem | Missouri | 15,657 | 1,950 | 753 |
| Douglas | Ava | Missouri | 13,684 | 2,107 | 814 |
| Dunklin | Kennett | Missouri | 31,953 | 1,401 | 541 |
| Franklin | Union | Missouri | 1,01,492 | 2,390 | 923 |
| Gasconade | Hermann | Missouri | 15,222 | 1,341 | 518 |
| Gentry | Albany | Missouri | 6,738 | 1,273 | 491 |
| Greene | Springfield | Missouri | 2,75,174 | 1,749 | 675 |
| Grundy | Trenton | Missouri | 10,261 | 1,127 | 435 |
| Harrison | Bethany | Missouri | 8,957 | 1,871 | 723 |
| Henry | Clinton | Missouri | 22,272 | 1,805 | 697 |
| Hickory | Hermitage | Missouri | 9,627 | 1,034 | 399 |
| Holt | Oregon | Missouri | 4,912 | 1,198 | 463 |
| Howard | Fayette | Missouri | 10,144 | 1,201 | 464 |
| Howell | West Plains | Missouri | 40,400 | 2,402 | 927 |
| Iron | Ironton | Missouri | 10,630 | 1,425 | 550 |
| Jackson | Independence | Missouri | 6,74,158 | 1,566 | 604 |
| Jasper | Carthage | Missouri | 1,17,404 | 1,654 | 638 |
| Jefferson | Hillsboro | Missouri | 2,18,733 | 1,701 | 657 |
| Johnson | Warrensburg | Missouri | 52,595 | 2,148 | 829 |
| Knox | Edina | Missouri | 4,131 | 1,305 | 504 |
| Laclede | Lebanon | Missouri | 35,571 | 1,981 | 765 |
| Lafayette | Lexington | Missouri | 33,381 | 1,628 | 628 |
| Lawrence | Mount Vernon | Missouri | 38,634 | 1,584 | 612 |
| Lewis | Monticello | Missouri | 10,211 | 1,308 | 505 |
| Lincoln | Troy | Missouri | 52,566 | 1,623 | 627 |
| Linn | Linneus | Missouri | 12,761 | 1,594 | 616 |
| Livingston | Chillicothe | Missouri | 15,195 | 1,379 | 532 |
| Macon | Macon | Missouri | 15,566 | 2,075 | 801 |
| Madison | Fredericktown | Missouri | 12,226 | 1,280 | 494 |
| Maries | Vienna | Missouri | 9,176 | 1,365 | 527 |
| Marion | Palmyra | Missouri | 28,781 | 1,132 | 437 |
| McDonald | Pineville | Missouri | 23,083 | 1,397 | 539 |
| Mercer | Princeton | Missouri | 3,785 | 1,175 | 454 |
| Miller | Tuscumbia | Missouri | 24,748 | 1,535 | 593 |
| Mississippi | Charleston | Missouri | 14,358 | 1,066 | 412 |
| Moniteau | California | Missouri | 15,607 | 1,075 | 415 |
| Monroe | Paris | Missouri | 8,840 | 1,677 | 648 |
| Montgomery | Montgomery City | Missouri | 12,236 | 1,389 | 536 |
| Morgan | Versailles | Missouri | 20,565 | 1,548 | 598 |
| New Madrid | New Madrid | Missouri | 18,956 | 1,748 | 675 |
| Newton | Neosho | Missouri | 58,114 | 1,618 | 625 |
| Nodaway | Maryville | Missouri | 23,370 | 2,271 | 877 |
| Oregon | Alton | Missouri | 10,881 | 2,046 | 790 |
| Osage | Linn | Missouri | 13,878 | 1,565 | 604 |
| Ozark | Gainesville | Missouri | 9,723 | 1,929 | 745 |
| Pemiscot | Caruthersville | Missouri | 18,296 | 1,276 | 493 |
| Perry | Perryville | Missouri | 18,971 | 1,229 | 474 |
| Pettis | Sedalia | Missouri | 42,201 | 1,767 | 682 |
| Phelps | Rolla | Missouri | 45,156 | 1,740 | 672 |
| Pike | Bowling Green | Missouri | 18,516 | 1,736 | 670 |
| Platte | Platte City | Missouri | 89,322 | 1,088 | 420 |
| Polk | Bolivar | Missouri | 31,137 | 1,646 | 636 |
| Pulaski | Waynesville | Missouri | 52,274 | 1,417 | 547 |
| Putnam | Unionville | Missouri | 4,979 | 1,340 | 517 |
| Ralls | New London | Missouri | 10,167 | 1,217 | 470 |
| Randolph | Huntsville | Missouri | 25,414 | 1,250 | 483 |
| Ray | Richmond | Missouri | 23,494 | 1,473 | 569 |
| Reynolds | Centerville | Missouri | 6,696 | 2,094 | 808 |
| Ripley | Doniphan | Missouri | 14,100 | 1,630 | 630 |
| Saint Charles | Saint Charles | Missouri | 3,60,485 | 1,452 | 560 |
| Saint Clair | Osceola | Missouri | 9,805 | 1,735 | 670 |
| Sainte Genevieve | Sainte Genevieve | Missouri | 18,145 | 1,293 | 499 |
| Saint Francois | Farmington | Missouri | 65,359 | 1,170 | 452 |
| Saint Louis | Clayton | Missouri | 9,98,954 | 1,315 | 508 |
| Saint Louis | Saint Louis | Missouri | 3,19,294 | 160 | 62 |
| Saline | Marshall | Missouri | 23,370 | 1,957 | 756 |
| Schuyler | Lancaster | Missouri | 4,431 | 796 | 307 |
| Scotland | Memphis | Missouri | 4,843 | 1,131 | 437 |
| Scott | Benton | Missouri | 39,191 | 1,088 | 420 |
| Shannon | Eminence | Missouri | 8,441 | 2,600 | 1,004 |
| Shelby | Shelbyville | Missouri | 6,373 | 1,297 | 501 |
| Stoddard | Bloomfield | Missouri | 29,968 | 2,132 | 823 |
| Stone | Galena | Missouri | 32,202 | 1,202 | 464 |
| Sullivan | Milan | Missouri | 6,714 | 1,678 | 648 |
| Taney | Forsyth | Missouri | 51,675 | 1,638 | 632 |
| Texas | Houston | Missouri | 26,008 | 3,049 | 1,177 |
| Vernon | Nevada | Missouri | 21,159 | 2,140 | 826 |
| Warren | Warrenton | Missouri | 32,513 | 1,110 | 429 |
| Washington | Potosi | Missouri | 25,195 | 1,968 | 760 |
| Wayne | Greenville | Missouri | 13,521 | 1,966 | 759 |
| Webster | Marshfield | Missouri | 36,202 | 1,535 | 593 |
| Worth | Grant City | Missouri | 2,171 | 691 | 267 |
| Wright | Hartville | Missouri | 18,815 | 1,766 | 682 |