County Maps US

Maries County, Missouri

A county in Missouri, ranked 97 of 115 by population.

CountyFIPS 29125

Within Missouri
Maries County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Vienna, the county seat, located via the 2025 Census Gazetteer.

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Population
8,397
-58 (-0.7%) since 2020
Land area
527
square miles. A further 0.6% of the total area is water
Population density
15.9
people per square mile, computed rather than published
County seat
Vienna
Seat of county government.
Established
1855
170 years ago
Largest city
Belle city
Population 1,166 for the whole place, which extends beyond this county.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Maries County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Maries County, Missouri from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 540 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Maries County ranks

Position among the 115 counties of Missouri, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MissouriNationally
Population8,39797th of 1152,550th of 3,144
Land area527 sq mi74th of 1151,987th of 3,144
Population density15.9 per sq mi89th of 1152,363rd of 3,144
Median household income$59,45560th of 1152,128th of 3,143

Full data for Maries County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population8,397Vintage 2025 Population Estimates
Population in 20208,455Vintage 2025 Population Estimates
2020 estimates base?8,431Vintage 2025 Population Estimates
Land area527 sq mi2025 Gazetteer Files
Water area2.9 sq mi2025 Gazetteer Files
Total area529.9 sq mi2025 Gazetteer Files
Population density?15.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$59,455American Community Survey 2020-2024 5-Year Estimates
Median home value$219,100American Community Survey 2020-2024 5-Year Estimates
Median age44.9American Community Survey 2020-2024 5-Year Estimates
Households3,428American Community Survey 2020-2024 5-Year Estimates
Housing units4,261American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-34
91 births, 125 deaths
Net migration
-61
More people moved out than moved in.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Maries County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Phelps CountyMissouri31 mi45,247
Osage CountyMissouri30 mi13,611
Miller CountyMissouri20 mi25,817
Gasconade CountyMissouri10 mi14,784
Pulaski CountyMissouri9.1 mi54,442

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 115 counties of Missouri

Open the interactive Missouri county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.