Plymouth County, Iowa Demographics 2026
Plymouth County, Iowa has a population of 25,747, the 24th most populous county in Iowa. The median household income is $83,251 and the median home value is $228,900. The poverty rate is 6.9%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Plymouth County Quick Facts
How Plymouth County Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 25,699 | 25,747 | +0.2% |
| Median household income | $81,600 | $83,251 | +2.0% |
| Median home value | $218,600 | $228,900 | +4.7% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 31 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Plymouth County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Le Mars | 10,640 | $74,701 | 9.2% | $219,200 |
| Remsen | 1,823 | $91,477 | 2.9% | $185,900 |
| Akron | 1,689 | $66,250 | 9.5% | $157,900 |
| Kingsley | 1,472 | $72,841 | 10.0% | $167,200 |
| Hinton | 931 | $114,531 | 1.4% | $263,100 |
| Merrill | 846 | $82,969 | 4.9% | $166,100 |
| Brunsville | 210 | $45,000 | 19.5% | $129,200 |
| Westfield | 123 | $68,125 | 8.1% | $117,500 |
| Oyens | 81 | $100,625 | 0.0% | $155,000 |
| Struble | 76 | $59,375 | 13.2% | $135,200 |
| Craig | 49 | $50,000 | 10.2% | $100,000 |
Explore Iowa Rankings
Population Overview
Plymouth County is located in Iowa with a total population of 25,747. It is the 24th most populous county out of 99 in Iowa. The county encompasses 11 Census-designated places.
Age Demographics
The median age in Plymouth County is 41.3 years. This is 7% higher than the state median of 38.6 years.
Economy, Income & Housing
The median household income in Plymouth County is $83,251. This is 11% higher than the state median of $75,059. It is also 3% higher than the national median of $80,734. The poverty rate stands at 6.9%. This is 38% lower than the state poverty rate of 11.1%. The unemployment rate is 2.2%. This is 39% lower than the state rate of 3.6%. The median home value is $228,900. Housing costs are 10% higher than the state median of $208,000. With a home-value-to-income ratio of just 2.7x, Plymouth County is one of the most affordable housing markets in the area. 73.6% of occupied housing units are owner-occupied. This homeownership rate is 3% higher than the state average of 71.7%.
Race & Ethnicity
Plymouth County has a predominantly White (non-Hispanic) population, comprising 88.0% of all residents. Hispanic or Latino residents account for 6.4%. The Asian population (0.5%) is well below the state average of 2.5%.
Education
21.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 31% lower than the state rate of 31.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.8%.
Data Sources & Methodology
All figures for Plymouth County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Iowa and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Plymouth County, Iowa?
Plymouth County has a population of 25,747, making it the 24th most populous county in Iowa.
What is the median income in Plymouth County?
The median household income in Plymouth County is $83,251 with a poverty rate of 6.9%.
How many cities are in Plymouth County, Iowa?
Plymouth County contains 11 Census-designated places.