Plymouth, Iowa Demographics & Population 2026
During the 2020–2024 ACS period, Plymouth, Iowa had a total population of 407, the 522nd largest city in Iowa, with a median household income of $80,000, which is 7% higher than the state average. The poverty rate is 13.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 1.6x.
Plymouth Quick Facts
How Plymouth 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 | 405 | 407 | +0.5% |
| Median household income | $66,250 | $80,000 | +20.8% |
| Median home value | $105,200 | $125,700 | +19.5% |
How Plymouth Compares
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+)
Plymouth Rankings in Iowa
Explore Iowa Rankings
Other Cities in Cerro Gordo County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Mason City | 27,050 | $64,804 | 12.0% | $142,000 |
| Clear Lake | 7,607 | $79,415 | 8.3% | $259,500 |
| Nora Springs | 1,363 | $78,594 | 5.3% | $134,500 |
| Rockwell | 986 | $60,982 | 14.8% | $163,300 |
| Ventura | 733 | $91,944 | 5.7% | $389,500 |
| Thornton | 514 | $67,031 | 9.3% | $115,500 |
| Meservey | 262 | $46,750 | 31.7% | $50,800 |
| Swaledale | 148 | $51,912 | 4.7% | $62,900 |
| Rock Falls | 119 | $71,042 | 5.9% | $156,300 |
| Dougherty | 88 | $45,500 | 8.0% | $50,000 |
Cities Similar to Plymouth
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Menlo | 398 | $77,396 | $107,100 | 8.6% | 5.3% |
| Mondamin | 403 | $75,000 | $102,700 | 19.1% | 12.9% |
| Holiday Lake | 397 | $82,868 | $284,800 | 37.2% | 4.0% |
| Callender | 413 | $75,000 | $107,100 | 13.0% | 5.0% |
| Pulaski | 403 | $73,438 | $102,600 | 15.6% | 11.7% |
A note before these figures: with a population of 407, Plymouth's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Plymouth is a small community located in Iowa, within Cerro Gordo County. The total population is 407. It ranks as the 522nd most populous out of 1,017 Census-designated places in Iowa.
Age Demographics
The median age in Plymouth is 38.8 years. This is about the same as the state median of 38.6 years.
Economy, Income & Housing
The median household income in Plymouth is $80,000. This is 7% higher than the state median of $75,059. It is also about the same as the national median of $80,734. The poverty rate stands at 13.0%. This is 18% higher than the state poverty rate of 11.1%. The unemployment rate is 5.7%. This is 58% higher than the state rate of 3.6%. The median home value is $125,700. Housing costs are 40% lower than the state median of $208,000. With a home-value-to-income ratio of just 1.6x, Plymouth is one of the most affordable housing markets in the area. 78.1% of occupied housing units are owner-occupied. This homeownership rate is 9% higher than the state average of 71.7%.
Race & Ethnicity
Plymouth has a predominantly White (non-Hispanic) population, comprising 97.0% of all residents. Black or African American residents account for 0.7%. The Black or African American population (0.7%) is well below the state average of 3.8%. The Hispanic or Latino population (0.7%) is well below the state average of 7.3%. The Asian population (0.3%) is well below the state average of 2.5%.
Education
11.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 65% 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 96.2%.
Data Sources & Methodology
All demographic data for Plymouth, Iowa is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Iowa state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,017 Census-designated places in Iowa. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Plymouth, Iowa?
Plymouth, Iowa has a population of 407 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Plymouth, IA?
The median household income in Plymouth is $80,000, which is about the same as the national median of $80,734.
What is the poverty rate in Plymouth, IA?
The poverty rate in Plymouth is 13.0%. This means approximately 53 residents live below the federal poverty line.
What is the racial makeup of Plymouth, Iowa?
Plymouth's population is 97.0% White, 0.7% Black, 0.7% Hispanic/Latino, and 0.3% Asian.
What is the median home value in Plymouth, IA?
The median home value in Plymouth is $125,700. The home-value-to-income ratio is 1.6x.
How educated is Plymouth, Iowa?
11.2% of adults (25+) in Plymouth hold a bachelor's degree or higher, and 0.4% hold a graduate or professional degree.