List of Missouri Counties and County Seats

The U.S. state of Missouri is divided into 114 counties and 1 Independent city. Explore list of California Counties and their County Seats in alphabetical order and check their population, areas and the date of formation.

S.N	County	County Seat	Population(2011)	Area	Formed
1	Adair County	Kirksville	25,607	568 sq mi	1841
2	Andrew County	Savannah	17,291	435 sq mi	1841
3	Atchison County	Rock Port	5,685	545 sq mi	1843
4	Audrain County	Mexico	25,529	693 sq mi	1831
5	Barry County	Cassville	35,597	779 sq mi	1835
6	Barton County	Lamar	12,402	594 sq mi	1855
7	Bates County	Butler	17,049	848 sq mi	1841
8	Benton County	Warsaw	19,056	706 sq mi	1835
9	Bollinger County	Marble Hill	12,363	621 sq mi	1851
10	Boone County	Columbia	162,642	685 sq mi	1821
11	Buchanan County	Saint Joseph	89,201	410 sq mi	1838
12	Butler County	Poplar Bluff	42,794	698 sq mi	1849
13	Caldwell County	Kingston	9,424	429 sq mi	1836
14	Callaway County	Fulton	44,332	839 sq mi	1821
15	Camden County	Camdenton	44,002	655 sq mi	1841
16	Cape Girardeau County	Jackson	75,674	579 sq mi	1812
17	Carroll County	Carrollton	9,295	695 sq mi	1833
18	Carter County	Van Buren	6,265	508 sq mi	1859
19	Cass County	Harrisonville	99,478	699 sq mi	1833
20	Cedar County	Stockton	13,982	476 sq mi	1845
21	Chariton County	Keytesville	7,831	756 sq mi	1821
22	Christian County	Ozark	77,422	563 sq mi	1859
23	Clark County	Kahoka	7,139	507 sq mi	1836
24	Clay County	Liberty	221,939	396 sq mi	1822
25	Clinton County	Plattsburg	20,743	419 sq mi	1833
26	Cole County	Jefferson City	75,990	392 sq mi	1820
27	Cooper County	Boonville	17,601	565 sq mi	1818
28	Crawford County	Steelville	24,696	743 sq mi	1829
29	Dade County	Greenfield	7,883	490 sq mi	1841
30	Dallas County	Buffalo	16,777	542 sq mi	1841
31	Daviess County	Gallatin	8,433	567 sq mi	1836
32	DeKalb County	Maysville	12,892	424 sq mi	1843
33	Dent County	Salem	15,657	754 sq mi	1851
34	Douglas County	Ava	13,684	815 sq mi	1857
35	Dunklin County	Kennett	31,953	546 sq mi	1843
36	Franklin County	Union	101,492	922 sq mi	1818
37	Gasconade County	Hermann	15,222	520 sq mi	1821
38	Gentry County	Albany	6,738	492 sq mi	1841
39	Greene County	Springfield	275,174	675 sq mi	1833
40	Grundy County	Trenton	10,261	436 sq mi	1839
41	Harrison County	Bethany	8,957	725 sq mi	1843
42	Henry County	Clinton	22,272	702 sq mi	1834
43	Hickory County	Hermitage	9,627	399 sq mi	1845
44	Holt County	Oregon	4,912	462 sq mi	1841
45	Howard County	Fayette	10,144	466 sq mi	1816
46	Howell County	West Plains	40,400	928 sq mi	1857
47	Iron County	Ironton	10,630	551 sq mi	1857
48	Jackson County	Kansas City,	674,158	605 sq mi	1826
49	Jasper County	Carthage	117,404	640 sq mi	1841
50	Jefferson County	Hillsboro	218,733	657 sq mi	1818
51	Johnson County	Warrensburg	52,595	831 sq mi	1834
52	Knox County	Edina	4,131	506 sq mi	1843
53	Laclede County	Lebanon	35,571	766 sq mi	1849
54	Lafayette County	Lexington	33,381	629 sq mi	1821
55	Lawrence County	Mount Vernon	38,634	613 sq mi	1843
56	Lewis County	Monticello	10,211	505 sq mi	1833
57	Lincoln County	Troy	52,566	630 sq mi	1818
58	Linn County	Linneus	12,761	620 sq mi	1837
59	Livingston County	Chillicothe	15,195	535 sq mi	1837
60	Macon County	Macon	15,566	804 sq mi	1837
61	Madison County	Fredericktown	12,226	497 sq mi	1818
62	Maries County	Vienna	9,176	528 sq mi	1855
63	Marion County	Palmyra	28,781	438 sq mi	1826
64	McDonald County	Pineville	23,083	540 sq mi	1847
65	Mercer County	Princeton	3,785	454 sq mi	1845
66	Miller County	Tuscumbia	24,748	592 sq mi	1837
67	Mississippi County	Charleston	14,358	413 sq mi	1842
68	Moniteau County	California	15,607	417 sq mi	1845
69	Monroe County	Paris	8,840	646 sq mi	1831
70	Montgomery County	Montgomery City	12,236	539 sq mi	1818
71	Morgan County	Versailles	20,565	598 sq mi	1833
72	New Madrid County	New Madrid	18,956	678 sq mi	1812
73	Newton County	Neosho	58,114	626 sq mi	1838
74	Nodaway County	Maryville	23,370	877 sq mi	1843
75	Oregon County	Alton	10,881	792 sq mi	1841
76	Osage County	Linn	13,878	606 sq mi	1841
77	Ozark County	Gainesville	9,723	747 sq mi	1841
78	Pemiscot County	Caruthersville	18,296	493 sq mi	1851
79	Perry County	Perryville	18,971	475 sq mi	1821
80	Pettis County	Sedalia	42,201	685 sq mi	1833
81	Phelps County	Rolla	45,156	673 sq mi	1857
82	Pike County	Bowling Green	18,516	673 sq mi	1818
83	Platte County	Platte City	89,322	420 sq mi	1838
84	Polk County	Bolivar	31,137	637 sq mi	1835
85	Pulaski County	Waynesville	52,274	547 sq mi	1833
86	Putnam County	Unionville	4,979	518 sq mi	1843
87	Ralls County	New London	10,167	471 sq mi	1821
88	Randolph County	Huntsville	25,414	482 sq mi	1829
89	Ray County	Richmond	23,494	570 sq mi	1820
90	Reynolds County	Centerville	6,696	811 sq mi	1845
91	Ripley County	Doniphan	14,100	630 sq mi	1831
92	Saint Charles County	Saint Charles	360,485	561 sq mi	1812
93	Saint Clair County	Osceola	9,805	677 sq mi	1841
94	Saint Francois County	Farmington	65,359	450 sq mi	1821
95	Saint Louis City	St. Louis	319,294	61.9 sq mi	1876
96	Saint Louis County	Clayton	1,000,438	508 sq mi	1812
97	Saline County	Marshall	23,370	756 sq mi	1820
98	Schuyler County	Lancaster	4,431	308 sq mi	1843
99	Scotland County	Memphis	4,843	438 sq mi	1841
100	Scott County	Benton	39,191	421 sq mi	1822
101	Shannon County	Eminence	8,441	1,004 sq mi	1837
102	Shelby County	Shelbyville	6,373	501 sq mi	1835
103	Ste. Genevieve County	Ste. Genevieve	18,145	502 sq mi	1812
104	Stoddard County	Bloomfield	29,968	827 sq mi	1835
105	Stone County	Galena	32,202	463 sq mi	1851
106	Sullivan County	Milan	6,714	651 sq mi	1843
107	Taney County	Forsyth	51,675	632 sq mi	1837
108	Texas County	Houston	26,008	1,179 sq mi	1843
109	Vernon County	Nevada	21,159	834 sq mi	1851
110	Warren County	Warrenton	32,513	432 sq mi	1833
111	Washington County	Potosi	25,195	760 sq mi	1813
112	Wayne County	Greenville	13,521	761 sq mi	1818
113	Webster County	Marshfield	36,202	593 sq mi	1855
114	Worth County	Grant City	2,171	266 sq mi	1861
115	Wright County	Hartville	18,815	682 sq mi	1841