Dubuque County, IA Demographics
Dubuque County, IA is the 8th most populous of 99 counties in Iowa, with 99,266 residents across 608 square miles. That is about 163 people per square mile.
At the 2020 census
| Population | 99,266 |
|---|---|
| Land area | 608 sq mi |
| Density | 163 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Dubuque 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: Dubuque County, IA
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Dubuque County, IA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Dubuque County, IA
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 102.01 | 6,666 | 55.1 | 121 |
| Census Tract 101.04 | 5,995 | 15.8 | 379 |
| Census Tract 105 | 4,741 | 14.6 | 326 |
| Census Tract 11.04 | 4,648 | 3.8 | 1,236 |
| Census Tract 102.02 | 4,490 | 48.4 | 93 |
| Census Tract 8.01 | 4,244 | 2.9 | 1,449 |
| Census Tract 12.05 | 4,133 | 1.4 | 3,031 |
| Census Tract 4 | 3,966 | 1.4 | 2,836 |
| Census Tract 104 | 3,887 | 144.5 | 27 |
| Census Tract 12.01 | 3,847 | 1.2 | 3,150 |
| Census Tract 9 | 3,759 | 0.8 | 4,897 |
| Census Tract 5 | 3,759 | 0.5 | 8,094 |
| Census Tract 101.05 | 3,701 | 57.4 | 64 |
| Census Tract 11.01 | 3,598 | 1.1 | 3,241 |
| Census Tract 101.03 | 3,550 | 4.7 | 758 |
| Census Tract 8.02 | 3,492 | 2.6 | 1,334 |
| Census Tract 7.01 | 3,436 | 0.5 | 6,952 |
| Census Tract 106 | 3,322 | 93.4 | 36 |
| Census Tract 103 | 3,270 | 144.4 | 23 |
| Census Tract 7.02 | 3,194 | 0.6 | 5,173 |
| Census Tract 6 | 3,175 | 0.7 | 4,478 |
| Census Tract 12.04 | 2,672 | 1.1 | 2,435 |
| Census Tract 1 | 2,661 | 1.9 | 1,429 |
| Census Tract 101.01 | 2,500 | 6.0 | 419 |
| Census Tract 11.03 | 2,261 | 2.5 | 915 |
| Census Tract 12.02 | 2,226 | 0.8 | 2,698 |
| Census Tract 3 | 2,073 | 0.3 | 7,816 |
Related places
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Metro areas containing Dubuque 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.