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All Marshall County population data above are from the US Census Bureau.
The population data for Marshall County are from the Census' American Community Survey 2017 5-year estimates and the Census' 2018 Population Estimates. The demographic data for Des Moines County, Greene County, Jasper County, and Story County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2017 5-year estimates, and were downloaded on 6 December 2018. Check out our FAQ section for more details.
With 39,981 people, Marshall County is the 15th most populated county in the state of Iowa out of 99 counties. But watch out, Marshall County, because Des Moines County with 39,138 people and Jasper County with 37,147 people are right behind you.
The largest Marshall County racial/ethnic groups are White (72.5%) followed by Hispanic (20.7%) and Asian (3.2%).
In 2017, the median household income of Marshall County residents was $52,752. Marshall County households made slightly more than Greene County households ($52,529) and Story County households ($52,671) . However, 11.2% of Marshall County residents live in poverty.
The median age for Marshall County residents is 38.5 years young.
86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group
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