Marshall County, IA Map
Official Census boundary of Marshall County, Iowa (FIPS 19127). Turn on flood zones, contours, land cover and school districts, measure distances, or click any spot to inspect it.
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Marshall County Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
40,114
Households
15,496
Median household income
$73,315
Median age
38.5 years
Median home value
$145,500
Median gross rent
$885/mo
Owner-occupied homes
75%
Bachelor's degree or higher
22.6%
Below poverty level
11.2%
Land area
572.5 sq mi
Population density
70 / sq mi