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All Plymouth County population data above are from the US Census Bureau.
The population data for Plymouth County are from the Census' American Community Survey 2017 5-year estimates and the Census' 2017 Population Estimates. The demographic data for Bremer County, Delaware County, Mahaska County, and Winneshiek 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 25,027 people, Plymouth County is the 25th most populated county in the state of Iowa out of 99 counties. But watch out, Plymouth County, because Bremer County with 24,741 people and Mahaska County with 22,301 people are right behind you.
The largest Plymouth County racial/ethnic groups are White (92.8%) followed by Hispanic (4.5%) and Two or More (1.2%).
In 2017, the median household income of Plymouth County residents was $61,316. Plymouth County households made slightly more than Delaware County households ($60,534) and Winneshiek County households ($60,788) . However, 9.1% of Plymouth County residents live in poverty.
The median age for Plymouth County residents is 40.5 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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