Johnson County, IA Map
Official Census boundary of Johnson County, Iowa (FIPS 19103). Turn on flood zones, contours, land cover and school districts, measure distances, or click any spot to inspect it.
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Johnson County Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
156,639
Households
63,341
Median household income
$74,935
Median age
31 years
Median home value
$308,600
Median gross rent
$1,122/mo
Owner-occupied homes
59.4%
Bachelor's degree or higher
55.2%
Below poverty level
17.1%
Land area
613 sq mi
Population density
256 / sq mi