Marathon County, WI Demographics
Marathon County, WI is the 10th most populous of 72 counties in Wisconsin, with 138,013 residents across 1,545 square miles. That is about 89 people per square mile.
At the 2020 census
| Population | 138,013 |
|---|---|
| Land area | 1,545 sq mi |
| Density | 89 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Marathon 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: Marathon County, WI
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Marathon County, WI — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Marathon County, WI
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 13 | 7,302 | 24.7 | 296 |
| Census Tract 11.06 | 6,358 | 22.9 | 278 |
| Census Tract 4 | 6,219 | 2.5 | 2,493 |
| Census Tract 16 | 6,194 | 236.7 | 26 |
| Census Tract 11.04 | 6,112 | 4.2 | 1,444 |
| Census Tract 19 | 5,963 | 102.3 | 58 |
| Census Tract 7 | 5,771 | 3.3 | 1,774 |
| Census Tract 12.02 | 5,622 | 38.7 | 145 |
| Census Tract 18 | 5,565 | 193.6 | 29 |
| Census Tract 11.03 | 5,313 | 3.9 | 1,363 |
| Census Tract 12.03 | 5,244 | 3.9 | 1,359 |
| Census Tract 3 | 5,198 | 5.0 | 1,043 |
| Census Tract 21.01 | 4,349 | 66.4 | 65 |
| Census Tract 15 | 4,281 | 87.8 | 49 |
| Census Tract 12.04 | 4,215 | 54.3 | 78 |
| Census Tract 20 | 3,836 | 68.2 | 56 |
| Census Tract 6.02 | 3,795 | 1.0 | 3,893 |
| Census Tract 14.01 | 3,702 | 7.4 | 503 |
| Census Tract 10 | 3,673 | 2.7 | 1,356 |
| Census Tract 17 | 3,593 | 155.9 | 23 |
| Census Tract 14.02 | 3,565 | 33.8 | 105 |
| Census Tract 8 | 3,557 | 1.6 | 2,156 |
| Census Tract 22 | 3,540 | 104.7 | 34 |
| Census Tract 23.02 | 3,449 | 135.1 | 26 |
| Census Tract 23.01 | 3,328 | 109.2 | 30 |
| Census Tract 1 | 3,118 | 0.7 | 4,683 |
| Census Tract 5 | 2,992 | 0.7 | 4,058 |
| Census Tract 21.02 | 2,792 | 37.8 | 74 |
| Census Tract 2 | 2,766 | 1.2 | 2,372 |
| Census Tract 11.05 | 2,487 | 32.4 | 77 |
| Census Tract 9 | 2,189 | 1.7 | 1,253 |
| Census Tract 6.01 | 1,925 | 1.0 | 1,963 |
Related places
Other counties nearby
Nearest counties
Metro areas containing Marathon 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.