Overview
Missouri is divided into 114 counties and one independent city. Counties are the primary sub-state units for administration, courts, property records and many local services across the state of Missouri. A comprehensive enumeration of county names, county seats and related contact information is available in official directories and reference lists; see the full county listing here for an up-to-date reference.
County government and functions
County government in Missouri operates to deliver services that are not provided by municipal governments. Typical responsibilities include maintaining non-municipal roads and bridges, operating local jails, supporting county courts and judicial administration, maintaining land and vital records, assessing property for taxation, and providing some public health and social services. Counties are governed by elected bodies commonly known as county commissions or county councils, and voters elect a number of countywide officials such as the sheriff, prosecuting attorney, assessor, recorder and treasurer.
Variation among counties
Counties in Missouri vary widely in population, area and character. Urban and suburban counties that surround large cities have different service demands and organizational structures than sparsely populated rural counties. Some counties adopt home-rule or charter forms of government that alter administrative details while still performing the basic county functions defined by state law. Demographic, economic and geographic differences influence how counties prioritize services and plan for development.
History and naming
Most Missouri counties were established during the 19th century as the state was settled and administrative needs increased. County names reflect a mix of national and local influences: many honor presidents, military leaders, statesmen or explorers; others preserve Indigenous place names or describe geographic features such as rivers, prairies and ridges. The pattern of county formation and occasional boundary adjustments followed migration, transportation routes and the growth of towns that became county seats.
Independent city of St. Louis
Unlike the other counties, the city of St. Louis is an independent city and is not part of any county. St. Louis separated from Saint Louis County in the 19th century and has operated as a separate jurisdiction since that change. Independent cities are uncommon in the United States outside the Commonwealth of Virginia; other notable independents include Baltimore in Maryland and Carson City, Nevada.
Uses and finding the full list
Knowing county boundaries and seats is important for legal jurisdiction, property transactions, voting, emergency services and regional planning. For researchers, planners and residents, official state and county websites provide current lists of counties, elected officials, contact information and links to county services. For a starting point and a complete directory of Missouri counties consult the reference above here.