St. Louis County, Missouri

St. Louis County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF ST LOUIS GUS Population: 992,929 (2024) ID: 168767	County	Official County Government	Contact: COUNTY EXECUTIVE 41 S CENTRAL AVE, FL 9, CLAYTON MO 63105-1759
CITY OF FLORISSANT GUS Population: 51,290 (2024) ID: 169130	Municipal	Municipal Government Within County	Contact: ADMINISTRATIVE ASST 955 SAINT FRANCOIS ST, FLORISSANT MO 63031-4925
CITY OF CHESTERFIELD GUS Population: 49,465 (2024) ID: 202069	Municipal	Municipal Government Within County	Contact: ASSISTANT DIRECTOR OF FINANCE 690 CHESTERFIELD PKWY W, CHESTERFIELD MO 63017-0760
CITY OF WILDWOOD GUS Population: 35,082 (2024) ID: 190688	Municipal	Municipal Government Within County	Contact: DEPARTMENT OF PLANNING 16860 MAIN ST, WILDWOOD MO 63040
CITY OF UNIVERSITY CITY GUS Population: 34,349 (2024) ID: 169152	Municipal	Municipal Government Within County	Contact: ADMINISTRATOR ANALYST 6801 DELMAR BLVD, UNIVERSITY CITY MO 63130-3104
CITY OF BALLWIN GUS Population: 31,036 (2024) ID: 194586	Municipal	Municipal Government Within County	Contact: FINANCE OFFICER 14811 MANCHESTER RD, BALLWIN MO 63011-4617
CITY OF KIRKWOOD GUS Population: 29,348 (2024) ID: 129595	Municipal	Municipal Government Within County	Contact: ASST CAO 139 S KIRKWOOD RD, KIRKWOOD MO 63122-4303
CITY OF MARYLAND HEIGHTS GUS Population: 27,671 (2024) ID: 169157	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 11911 DORSETT RD, MARYLAND HEIGHTS MO 63043-2597
CITY OF HAZELWOOD GUS Population: 24,951 (2024) ID: 194627	Municipal	Municipal Government Within County	Contact: MAYOR 415 ELM GROVE LN, HAZELWOOD MO 63042-1942
CITY OF WEBSTER GROVES GUS Population: 23,525 (2024) ID: 194631	Municipal	Municipal Government Within County	Contact: DIRECTOR OF PLANNING & DEVELOPMENT 4 E LOCKWOOD AVE, WEBSTER GROVES MO 63119-3088
CITY OF CREVE COEUR GUS Population: 18,533 (2024) ID: 107707	Municipal	Municipal Government Within County	Contact: DIRECTOR OF FINANCE 300 N NEW BALLAS RD, CREVE COEUR MO 63141-7501
CITY OF MANCHESTER GUS Population: 18,122 (2024) ID: 169137	Municipal	Municipal Government Within County	Contact: FINANCE DIRECTOR 14318 MANCHESTER RD, MANCHESTER MO 63011
CITY OF FERGUSON GUS Population: 18,043 (2024) ID: 204835	Municipal	Municipal Government Within County	Contact: CITY CLERK 110 CHURCH ST, FERGUSON MO 63135-2411
CITY OF CLAYTON GUS Population: 17,512 (2024) ID: 129591	Municipal	Municipal Government Within County	Contact: DIRECTOR OF FINANCE AND ADMINISTRATION 10 N BEMISTON AVE, CLAYTON MO 63105-3397
CITY OF OVERLAND GUS Population: 15,547 (2024) ID: 190687	Municipal	Municipal Government Within County	Contact: CITY CLERK 9119 LACKLAND RD, OVERLAND MO 63114-5495
CITY OF EUREKA GUS Population: 13,277 (2024) ID: 169128	Municipal	Municipal Government Within County	Contact: BUILDING DEPARTMENT ASSISTANT PO BOX 125, EUREKA MO 63025-0125
CITY OF JENNINGS GUS Population: 13,024 (2024) ID: 208646	Municipal	Municipal Government Within County	Contact: CITY CLERK 2120 HORD AVE, JENNINGS MO 63136-3898
CITY OF ST ANN GUS Population: 12,704 (2024) ID: 129599	Municipal	Municipal Government Within County	Contact: MAYOR 10405 SAINT CHARLES ROCK RD, SAINT ANN MO 63074-1815
CITY OF CRESTWOOD GUS Population: 12,239 (2024) ID: 169125	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 1 DETJEN DR, SAINT LOUIS MO 63126-1697
CITY OF TOWN AND COUNTRY GUS Population: 11,625 (2024) ID: 169151	Municipal	Municipal Government Within County	Contact: PLANNING DIRECTOR 1011 MUNICIPAL CENTER DR, SAINT LOUIS MO 63131-1101
CITY OF BRIDGETON GUS Population: 11,301 (2024) ID: 204834	Municipal	Municipal Government Within County	Contact: PLANNING DEVELOPMENT ADMIN 12355 NATURAL BRIDGE RD, BRIDGETON MO 63044-2068
CITY OF BELLEFONTAINE NEIGHBORS GUS Population: 10,401 (2024) ID: 169114	Municipal	Municipal Government Within County	Contact: CITY CLERK 9641 BELLEFONTAINE RD, SAINT LOUIS MO 63137-1899
CITY OF ELLISVILLE GUS Population: 10,359 (2024) ID: 208644	Municipal	Municipal Government Within County	Contact: CITY CLERK 1 WEIS AVE, ELLISVILLE MO 63011-2107
CITY OF DES PERES GUS Population: 9,171 (2024) ID: 169127	Municipal	Municipal Government Within County	Contact: MAYOR 12325 MANCHESTER RD, DES PERES MO 63131-4389
CITY OF SUNSET HILLS GUS Population: 9,099 (2024) ID: 208651	Municipal	Municipal Government Within County	Contact: CITY CLERK 3939 S LINDBERGH BLVD, SAINT LOUIS MO 63127-1395
CITY OF RICHMOND HEIGHTS GUS Population: 9,096 (2024) ID: 169145	Municipal	Municipal Government Within County	Contact: CITY MANAGER 1330 S BIG BEND BLVD, RICHMOND HEIGHTS MO 63117-2294
CITY OF OLIVETTE GUS Population: 8,960 (2024) ID: 169142	Municipal	Municipal Government Within County	Contact: CITY MAGAGER 9473 OLIVE BLVD, OLIVETTE MO 63132-3131
CITY OF LADUE GUS Population: 8,937 (2024) ID: 107710	Municipal	Municipal Government Within County	Contact: ACCOUNTS PAYABLE AND HUMAN RESOURCES 9345 CLAYTON RD, SAINT LOUIS MO 63124-1511
CITY OF BRENTWOOD GUS Population: 8,111 (2024) ID: 186255	Municipal	Municipal Government Within County	Contact: MAYOR 2348 S BRENTWOOD BLVD, BRENTWOOD MO 63144-2097
CITY OF MAPLEWOOD GUS Population: 8,077 (2024) ID: 107711	Municipal	Municipal Government Within County	Contact: ASSITANT PUBLIC WORKS DIRECTOR 7601 MANCHESTER RD, MAPLEWOOD MO 63143-2840
CITY OF BERKELEY GUS Population: 8,058 (2024) ID: 169117	Municipal	Municipal Government Within County	Contact: CITY CLERK 8425 AIRPORT RD, BERKELEY MO 63134
CITY OF VALLEY PARK GUS Population: 6,747 (2024) ID: 129601	Municipal	Municipal Government Within County	Contact: MAYOR 320 BENTON ST, STE A, VALLEY PARK MO 63088-1735
CITY OF BLACK JACK GUS Population: 6,575 (2024) ID: 169158	Municipal	Municipal Government Within County	Contact: MAYOR 12500 OLD JAMESTOWN RD, FLORISSANT MO 63033-8509
CITY OF ST JOHNS GUS Population: 6,472 (2024) ID: 169148	Municipal	Municipal Government Within County	Contact: CITY MANAGER POLICE CHIEF 8944 SAINT CHARLES ROCK RD, STE 100, SAINT LOUIS MO 63114-4231
CITY OF SHREWSBURY GUS Population: 6,263 (2024) ID: 186259	Municipal	Municipal Government Within County	Contact: MAYOR 5200 SHREWSBURY AVE, SAINT LOUIS MO 63119-4398
CITY OF GLENDALE GUS Population: 6,082 (2024) ID: 213136	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR/CITY CLERK 424 N SAPPINGTON RD, SAINT LOUIS MO 63122-4799
CITY OF DELLWOOD GUS Population: 4,833 (2024) ID: 169126	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 1415 CHAMBERS RD, SAINT LOUIS MO 63135-2296
CITY OF ROCK HILL GUS Population: 4,669 (2024) ID: 107712	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 320 W THORNTON, ST LOUIS MO 63119
CITY OF BRECKENRIDGE HILLS GUS Population: 4,369 (2024) ID: 169119	Municipal	Municipal Government Within County	Contact: CITY CLERK 9623 SAINT CHARLES ROCK RD, STE 2, BRECKENRIDGE HILLS MO 63114-2636
CITY OF NORMANDY GUS Population: 4,247 (2024) ID: 169140	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 7700 NATURAL BRIDGE RD, NORMANDY MO 63121-4988
CITY OF FENTON GUS Population: 4,073 (2024) ID: 212748	Municipal	Municipal Government Within County	Contact: MAYOR 625 NEW SMIZER MILL RD, FENTON MO 63026-3597
CITY OF WOODSON TERRACE GUS Population: 3,888 (2024) ID: 208650	Municipal	Municipal Government Within County	Contact: CITY CLERK 4323 WOODSON RD, WOODSON TERRACE MO 63134-3821
CITY OF FRONTENAC GUS Population: 3,777 (2024) ID: 186257	Municipal	Municipal Government Within County	Contact: MAYOR 10555 CLAYTON RD, 1, SAINT LOUIS MO 63131-2986
CITY OF NORTHWOODS GUS Population: 3,592 (2024) ID: 129597	Municipal	Municipal Government Within County	Contact: MAYOR 4600 OAKRIDGE BLVD, SAINT LOUIS MO 63121-3099
CITY OF PINE LAWN GUS Population: 2,693 (2024) ID: 169144	Municipal	Municipal Government Within County	Contact: MAYOR CITY OF PINE LAWN 6250 STEVE MARRE AVE, PINE LAWN MO 63212-3499
CITY OF GREEN PARK GUS Population: 2,682 (2024) ID: 138859	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 11100 MUELLER RD, STE 6, SAINT LOUIS MO 63123-6960
CITY OF CLARKSON VALLEY GUS Population: 2,557 (2024) ID: 138858	Municipal	Municipal Government Within County	Contact: CITY CLERK TREASURER 15933 CLAYTON RD, SUITE 105, BALLWIN MO 63011-2172
CITY OF PAGEDALE GUS Population: 2,516 (2024) ID: 202068	Municipal	Municipal Government Within County	Contact: MAYOR 1420 FERGUSON AVE, SAINT LOUIS MO 63133-1720
VILLAGE OF RIVERVIEW GUS Population: 2,334 (2024) ID: 169146	Municipal	Municipal Government Within County	Contact: CLERK 9699 LILAC DR, SAINT LOUIS MO 63137-3299
VILLAGE OF MARLBOROUGH GUS Population: 2,191 (2024) ID: 129596	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK 7826 WIMBLEDON DR, MARLBOROUGH MO 63119