County Maps US

Moniteau County, Missouri

A county in Missouri, ranked 65 of 115 by population.

CountyFIPS 29135

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

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Population
15,428
+205 (+1.3%) since 2020
Land area
415
square miles. A further 0.9% of the total area is water
Population density
37.2
people per square mile, computed rather than published
County seat
California
Seat of county government.
Established
1845
180 years ago
Largest city
California city
Population 4,523.

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 Moniteau 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 Moniteau 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 607 by 800 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 Moniteau 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
Population15,42865th of 1152,067th of 3,144
Land area415 sq mi107th of 1152,436th of 3,144
Population density37.2 per sq mi50th of 1151,743rd of 3,144
Median household income$65,71531st of 1151,569th of 3,143

Full data for Moniteau County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population15,428Vintage 2025 Population Estimates
Population in 202015,223Vintage 2025 Population Estimates
2020 estimates base?15,473Vintage 2025 Population Estimates
Land area415 sq mi2025 Gazetteer Files
Water area3.8 sq mi2025 Gazetteer Files
Total area418.9 sq mi2025 Gazetteer Files
Population density?37.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$65,715American Community Survey 2020-2024 5-Year Estimates
Median home value$181,900American Community Survey 2020-2024 5-Year Estimates
Median age38.4American Community Survey 2020-2024 5-Year Estimates
Households5,729American Community Survey 2020-2024 5-Year Estimates
Housing units6,175American 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
194 births, 160 deaths
Net migration
-34
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 Moniteau 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
Cooper CountyMissouri30 mi17,136
Morgan CountyMissouri22 mi22,418
Cole CountyMissouri22 mi77,908
Boone CountyMissouri17 mi191,746
Miller CountyMissouri7.1 mi25,817

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.