Counties in Missouri
Each county page says how cases move there under Missouri's rules, and lists the police agencies that serve it.
115 counties, largest first
- St. Louis County990,911 people · 85 agencies
- Jackson County732,994 people · 21 agencies
- St. Charles County426,499 people · 15 agencies
- Greene County309,286 people · 15 agencies
- St. Louis city278,144 people · 1 agencies
- Clay County265,032 people · 17 agencies
- Jefferson County233,132 people · 14 agencies
- Boone County191,746 people · 7 agencies
- Jasper County127,428 people · 14 agencies
- Cass County115,859 people · 18 agencies
- Platte County114,400 people · 15 agencies
- Franklin County108,090 people · 10 agencies
- Christian County96,725 people · 10 agencies
- Cape Girardeau County83,999 people · 5 agencies
- Buchanan County83,540 people · 6 agencies
- Cole County77,908 people · 5 agencies
- St. Francois County67,809 people · 11 agencies
- Lincoln County66,676 people · 9 agencies
- Newton County62,263 people · 9 agencies
- Taney County57,001 people · 6 agencies
- Johnson County56,670 people · 8 agencies
- Pulaski County54,442 people · 6 agencies
- Callaway County45,765 people · 7 agencies
- Phelps County45,247 people · 7 agencies
- Pettis County44,254 people · 6 agencies
- Camden County44,047 people · 8 agencies
- Webster County43,054 people · 6 agencies
- Butler County41,904 people · 4 agencies
- Howell County40,798 people · 4 agencies
- Lawrence County39,401 people · 7 agencies
- Warren County39,016 people · 6 agencies
- Scott County37,975 people · 10 agencies
- Laclede County36,943 people · 4 agencies
- Barry County36,200 people · 9 agencies
- Polk County33,604 people · 6 agencies
- Lafayette County33,531 people · 15 agencies
- Stone County32,503 people · 8 agencies
- Marion County28,525 people · 4 agencies
- Stoddard County28,284 people · 8 agencies
- Dunklin County26,855 people · 10 agencies
- Texas County25,994 people · 6 agencies
- Miller County25,817 people · 5 agencies
- Adair County25,684 people · 3 agencies
- Audrain County24,528 people · 6 agencies
- Randolph County24,513 people · 4 agencies
- McDonald County23,992 people · 7 agencies
- Washington County23,810 people · 3 agencies
- Ray County23,398 people · 11 agencies
- Saline County23,265 people · 5 agencies
- Crawford County22,929 people · 7 agencies
- Henry County22,671 people · 5 agencies
- Morgan County22,418 people · 6 agencies
- Clinton County21,661 people · 7 agencies
- Benton County20,536 people · 5 agencies
- Nodaway County20,174 people · 3 agencies
- Vernon County19,946 people · 3 agencies
- Wright County19,671 people · 5 agencies
- Perry County19,093 people · 2 agencies
- Ste. Genevieve County18,689 people · 3 agencies
- Andrew County18,241 people · 3 agencies
- Dallas County18,025 people · 2 agencies
- Pike County17,955 people · 5 agencies
- Cooper County17,136 people · 5 agencies
- Bates County16,512 people · 5 agencies
- Moniteau County15,428 people · 4 agencies
- Macon County15,190 people · 3 agencies
- New Madrid County15,086 people · 14 agencies
- Cedar County14,888 people · 3 agencies
- Gasconade County14,784 people · 6 agencies
- Livingston County14,708 people · 2 agencies
- Dent County14,584 people · 3 agencies
- Pemiscot County14,465 people · 10 agencies
- Osage County13,611 people · 5 agencies
- Madison County12,858 people · 3 agencies
- Douglas County12,342 people · 2 agencies
- Mississippi County12,003 people · 5 agencies
- Linn County11,815 people · 4 agencies
- Barton County11,795 people · 4 agencies
- Montgomery County11,590 people · 7 agencies
- Wayne County10,782 people · 4 agencies
- Ripley County10,717 people · 3 agencies
- Bollinger County10,646 people · 2 agencies
- Ralls County10,444 people · 6 agencies
- Howard County10,180 people · 4 agencies
- St. Clair County9,976 people · 4 agencies
- Lewis County9,879 people · 4 agencies
- DeKalb County9,795 people · 4 agencies
- Grundy County9,744 people · 2 agencies
- Iron County9,318 people · 6 agencies
- Ozark County9,172 people · 3 agencies
- Hickory County9,044 people · 1 agencies
- Caldwell County9,012 people · 5 agencies
- Monroe County8,959 people · 2 agencies
- Oregon County8,709 people · 3 agencies
- Daviess County8,558 people · 2 agencies
- Carroll County8,417 people · 3 agencies
- Maries County8,397 people · 3 agencies
- Harrison County8,281 people · 3 agencies
- Dade County7,804 people · 3 agencies
- Chariton County7,377 people · 6 agencies
- Shannon County7,285 people · 5 agencies
- Clark County6,475 people · 3 agencies
- Gentry County6,384 people · 3 agencies
- Reynolds County5,992 people · 3 agencies
- Shelby County5,870 people · 4 agencies
- Sullivan County5,738 people · 3 agencies
- Carter County5,418 people · 4 agencies
- Atchison County5,175 people · 3 agencies
- Scotland County4,796 people · 3 agencies
- Putnam County4,546 people · 2 agencies
- Holt County4,200 people · 3 agencies
- Schuyler County4,140 people · 2 agencies
- Knox County3,728 people · 2 agencies
- Mercer County3,404 people · 1 agencies
- Worth County1,914 people · 1 agencies
Population: Census Bureau county population estimates, Vintage 2025 (cc-est2025-alldata), July 1, 2025.