Ottawa County, OH Demographics
Ottawa County, OH is the 62nd most populous of 88 counties in Ohio, with 40,328 residents across 255 square miles. That is about 158 people per square mile.
At the 2020 census
| Population | 40,328 |
|---|---|
| Land area | 255 sq mi |
| Density | 158 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Ottawa 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: Ottawa County, OH
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Ottawa County, OH — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Ottawa County, OH
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 509 | 5,359 | 72.5 | 74 |
| Census Tract 510 | 4,825 | 26.0 | 185 |
| Census Tract 508 | 3,966 | 57.3 | 69 |
| Census Tract 511 | 3,773 | 25.3 | 149 |
| Census Tract 507 | 3,462 | 5.4 | 636 |
| Census Tract 506 | 3,179 | 2.0 | 1,609 |
| Census Tract 505 | 2,997 | 1.7 | 1,769 |
| Census Tract 503.01 | 2,761 | 11.4 | 242 |
| Census Tract 503.02 | 2,163 | 6.7 | 323 |
| Census Tract 502.01 | 2,024 | 2.5 | 821 |
| Census Tract 512.02 | 1,729 | 21.6 | 80 |
| Census Tract 502.02 | 1,687 | 3.1 | 537 |
| Census Tract 512.01 | 1,109 | 8.2 | 136 |
| Census Tract 501 | 813 | 5.0 | 164 |
| Census Tract 512.03 | 517 | 6.1 | 85 |
Related places
Other counties nearby
Nearest counties
Metro areas containing Ottawa 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.