Marengo, Iowa Demographics & Population 2026
During the 2020–2024 ACS period, Marengo, Iowa had a total population of 2,725, the 132nd largest city in Iowa, with a median household income of $57,941, which is 23% lower than the state average. The poverty rate is 13.2%.
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 2.1x.
- Near full employment with an unemployment rate of just 1.8%.
Marengo Quick Facts
How Marengo 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 | 2,823 | 2,725 | -3.5% |
| Median household income | $58,125 | $57,941 | -0.3% |
| Median home value | $114,100 | $123,200 | +8.0% |
How Marengo 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+)
Marengo Rankings in Iowa
Explore Iowa Rankings
Other Cities in Iowa County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Williamsburg | 3,360 | $58,059 | 5.8% | $204,300 |
| North English | 852 | $54,531 | 10.3% | $118,600 |
| Amana | 755 | $145,903 | 8.1% | $248,400 |
| Middle Amana | 683 | $100,296 | 7.3% | $267,000 |
| Parnell | 303 | $70,893 | 13.2% | $181,300 |
| Homestead | 252 | $74,886 | 0.0% | $179,900 |
| Ladora | 240 | $60,625 | 9.6% | $78,200 |
| Conroy | 199 | N/A | 4.0% | $213,000 |
| Millersburg | 129 | $79,688 | 7.0% | $106,500 |
| West Amana | 124 | $55,977 | 0.0% | $184,100 |
Cities Similar to Marengo
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Belmond | 2,694 | $56,528 | $129,100 | 29.9% | 19.8% |
| Bloomfield | 2,742 | $60,769 | $132,000 | 23.8% | 6.9% |
| Sibley | 2,803 | $55,070 | $122,000 | 22.9% | 23.5% |
| Clarion | 2,770 | $64,625 | $116,200 | 26.5% | 10.5% |
| Rock Rapids | 2,661 | $63,942 | $206,700 | 21.7% | 6.5% |
Population Overview
Marengo is a small community located in Iowa, within Iowa County. The total population is 2,725. It ranks as the 132nd most populous out of 1,017 Census-designated places in Iowa.
Age Demographics
The median age in Marengo is 39.6 years. This is 3% higher than the state median of 38.6 years.
Economy, Income & Housing
The median household income in Marengo is $57,941. This is 23% lower than the state median of $75,059. It is also 28% lower than the national median of $80,734. The poverty rate stands at 13.2%. This is 19% higher than the state poverty rate of 11.1%. The unemployment rate is 1.8%. This is 49% lower than the state rate of 3.6%. The median home value is $123,200. Housing costs are 41% lower than the state median of $208,000. With a home-value-to-income ratio of just 2.1x, Marengo is one of the most affordable housing markets in the area. 69.2% of occupied housing units are owner-occupied. This homeownership rate is 4% lower than the state average of 71.7%.
Race & Ethnicity
Marengo has a predominantly White (non-Hispanic) population, comprising 94.9% of all residents. Black or African American residents account for 1.1%. The Black or African American population (1.1%) is well below the state average of 3.8%. The Hispanic or Latino population (0.3%) is well below the state average of 7.3%.
Education
12.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 59% 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 91.4%.
Data Sources & Methodology
All demographic data for Marengo, 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.
Free data download: Get all Iowa city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Marengo, Iowa?
Marengo, Iowa has a population of 2,725 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Marengo, IA?
The median household income in Marengo is $57,941, which is 28% lower than the national median of $80,734.
What is the poverty rate in Marengo, IA?
The poverty rate in Marengo is 13.2%. This means approximately 347 residents live below the federal poverty line.
What is the racial makeup of Marengo, Iowa?
Marengo's population is 94.9% White, 1.1% Black, 0.3% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Marengo, IA?
The median home value in Marengo is $123,200. The home-value-to-income ratio is 2.1x.
How educated is Marengo, Iowa?
12.9% of adults (25+) in Marengo hold a bachelor's degree or higher, and 2.7% hold a graduate or professional degree.