Buchanan County, MO Demographics
Buchanan County, MO is the 14th most populous of 115 counties in Missouri, with 84,793 residents across 408 square miles. That is about 208 people per square mile.
At the 2020 census
| Population | 84,793 |
|---|---|
| Land area | 408 sq mi |
| Density | 208 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Buchanan County compares to the US
We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Buchanan County, MO
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Buchanan County, MO — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Buchanan County, MO
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 1 | 6,343 | 5.0 | 1,272 |
| Census Tract 15 | 4,912 | 0.9 | 5,340 |
| Census Tract 28 | 4,842 | 107.6 | 45 |
| Census Tract 6 | 4,814 | 2.1 | 2,323 |
| Census Tract 7.01 | 4,576 | 3.2 | 1,435 |
| Census Tract 9 | 4,521 | 0.8 | 5,380 |
| Census Tract 2 | 4,336 | 2.5 | 1,737 |
| Census Tract 7.02 | 4,334 | 1.9 | 2,279 |
| Census Tract 17 | 4,308 | 4.1 | 1,053 |
| Census Tract 27 | 3,514 | 135.4 | 26 |
| Census Tract 18 | 3,338 | 2.1 | 1,579 |
| Census Tract 29 | 3,059 | 112.9 | 27 |
| Census Tract 30.01 | 2,961 | 3.0 | 993 |
| Census Tract 5 | 2,852 | 1.1 | 2,631 |
| Census Tract 3 | 2,701 | 9.9 | 273 |
| Census Tract 30.02 | 2,582 | 0.7 | 3,852 |
| Census Tract 16 | 2,556 | 0.7 | 3,670 |
| Census Tract 10 | 2,279 | 0.5 | 4,864 |
| Census Tract 11 | 2,259 | 0.6 | 3,783 |
| Census Tract 23 | 2,229 | 2.2 | 1,006 |
| Census Tract 21 | 2,188 | 2.4 | 920 |
| Census Tract 25 | 1,973 | 1.3 | 1,484 |
| Census Tract 22 | 1,956 | 5.6 | 347 |
| Census Tract 24 | 1,907 | 0.5 | 4,002 |
| Census Tract 12 | 1,890 | 0.6 | 3,217 |
| Census Tract 4 | 1,563 | 0.7 | 2,284 |
Related places
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Metro areas containing Buchanan County
About this page
This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.
Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.