Iowa 2020 Census Population Density By County Map

The population density of Iowa from the 2020 Census was 57.12 people per square mile, based on data from the US Census Bureau.

Polk County had the highest population density (860.54 people per square mile), followed by Scott County (381.29 people per square mile), and then Linn County (321.17 people per square mile). On the other hand, the 3 counties with the lowest population density were: Ringgold County (8.71 people per square mile), Adams County (8.75 people per square mile), and Taylor County (11.09 people per square mile).

You can also see this information for other states and also for the US by state.

Hover over or click on the counties to see the population density for each county. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.