City · Iowa
Mondamin, Iowa
Mondamin, city, in Harrison County, Iowa. Mondamin had 332 residents on July 1, 2025 by the Census Bureau's estimate, down 0.9% since 2020; the 2020 Census counted 339 and the ACS 2020-2024 5-year estimates put it at 403 (±110). GEOID 1953175.
Residents, July 2025 estimate
332
Census Bureau estimate (no margin published)
2020 Census count: 339 · ACS 2020-2024: 403 ±110
Median household income
$75,000
±$27,691 (90% margin)
Iowa: $75,059
Median home value
$102,700
±$20,650 (90% margin)
Iowa: $208,000
Median gross rent
$890
±$173 (90% margin)
Iowa: $972
Where is Mondamin and what county is it in?
Mondamin is a city in Harrison County, Iowa. It covers 0.5 square miles of land, 750 residents per square mile in 2020.
Mondamin is in the Omaha, NE-IA metropolitan statistical area, which takes in 8 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Mondamin, and is it growing?
The Census Bureau estimates that 332 people lived in Mondamin on July 1, 2025, down 0.9% since 2020, while Iowa grew 1.5%. The 2020 Census counted 339 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 403 (±110).
| Measure | Mondamin | Harrison County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 403 ±110 | 14,632 | no clear change |
| Households | 174 ±42 | 6,089 | no clear change |
| Average household size | 2.32 ±0.30 | 2.36 | no clear change |
| Housing units | 200 ±46 | 6,698 | no clear change |
Mondamin's population since 2000
From 423 in 2000 to 332 in 2025: down 21.5%. The 2000, 2010 and 2020 figures are census counts, each for Mondamin as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Mondamin?
The median resident of Mondamin is 41.3 years old; 24.3% are under 18 and 15.9% are 65 or older. The largest group is non-Hispanic white residents at 93.3%, then non-Hispanic residents of two or more races at 4.2%.
| Measure | Mondamin | Harrison County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.3 ±7.3 | 42.1 | no clear change |
| Under 18 years | 24.3% ±8.5 pts | 23.1% | – |
| 65 years and over | 15.9% ±7.0 pts | 20.1% | – |
| Male | 46.4% ±6.6 pts | 50.9% | – |
| Hispanic or Latino (any race) | 2.0% ±2.1 pts | 2.2% | – |
| White alone, not Hispanic | 93.3% ±4.2 pts | 94.4% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±6.0 pts | 0.1% | – |
| Asian alone, not Hispanic | 0.0% ±6.0 pts | 0.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±6.0 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±6.0 pts | 0.0% | – |
| Two or more races, not Hispanic | 4.2% ±3.9 pts | 2.7% | – |
| Some other race alone, not Hispanic | 0.5% ±0.9 pts | 0.2% | – |
| Born outside the United States | 1.7% ±2.0 pts | 0.8% | – |
| Speak a language other than English at home (age 5+) | 2.6% ±2.3 pts | 1.4% | – |
| Civilian veterans (age 18+) | 10.5% ±5.9 pts | 8.6% | – |
| With a disability | 13.4% ±6.3 pts | 11.9% | – |
| No health insurance coverage | 2.7% ±2.3 pts | 4.7% | – |
| High school graduate or higher (age 25+) | 94.5% ±3.4 pts | 93.8% | – |
| Bachelor's degree or higher (age 25+) | 19.0% ±6.2 pts | 22.0% | no clear change |
| Graduate or professional degree (age 25+) | 3.3% ±2.3 pts | 5.8% | – |
| Lived in the same house a year earlier | 86.6% ±7.5 pts | 93.3% | – |
| Moved from another state in the past year | 3.5% ±4.4 pts | 2.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Mondamin earn?
Half of Mondamin's 174 households earn less than $75,000 a year (±$27,691), against $79,535 in Harrison County and $75,059 in Iowa. In 2015-2019 it was $77,688 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Mondamin | Harrison County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $75,000 ±$27,691 | $79,535 | no clear change |
| Mean household income | $79,871 ±$13,455 | $94,184 | – |
| Per capita income | $33,603 ±$5,884 | $39,351 | no clear change |
| People below the poverty line | 12.9% ±9.0 pts | 7.1% | – |
| Children under 18 below the poverty line | 28.6% ±25.8 pts | 9.6% | – |
| Households receiving SNAP | 9.8% ±6.4 pts | 6.5% | – |
| Households with a computer | 93.1% ±5.3 pts | 95.2% | – |
| Households with a broadband subscription | 84.5% ±9.0 pts | 86.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Mondamin?
Owners occupy 76.4% of Mondamin's occupied homes and renters 23.6%. The median owner-occupied home is valued at $102,700 by its owner (±$20,650). The median renter pays $890 a month including utilities.
| Measure | Mondamin | Harrison County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $102,700 ±$20,650 | $176,000 | no clear change |
| Median gross rent | $890 ±$173 | $849 | no clear change |
| Renters paying 35% or more of income on rent | 32.4% ±21.8 pts | 25.0% | – |
| Median monthly owner costs, with a mortgage | $1,326 ±$181 | $1,357 | – |
| Owner-occupied homes | 76.4% ±10.6 pts | 77.1% | no clear change |
| Renter-occupied homes | 23.6% ±10.6 pts | 22.9% | – |
| Housing units | 200 ±46 | 6,698 | no clear change |
| Homeowner vacancy rate | 0.0% ±16.6 pts | 0.7% | – |
| Rental vacancy rate | 0.0% ±40.6 pts | 0.6% | – |
| Single-family detached homes | 77.0% ±11.2 pts | 85.2% | – |
| Mobile homes | 17.0% ±9.6 pts | 4.6% | – |
| Built 2020 or later | 0.0% ±11.7 pts | 1.6% | – |
| Built 2010 to 2019 | 2.0% ±3.4 pts | 3.4% | – |
| Built 1939 or earlier | 38.5% ±10.3 pts | 44.3% | – |
| Households with no vehicle | 3.4% ±4.1 pts | 4.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Mondamin building?
Builders took permits for 1 new housing units in Mondamin in 2025 (1 in single-family houses), 3.0 per 1,000 residents against 4.2 across Iowa.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Mondamin work and get to work?
74.0% of Mondamin's workers drive alone and 13.0% work from home. The average trip to work takes 26.3 minutes.
| Measure | Mondamin | Harrison County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 65.5% ±9.8 pts | 65.2% | – |
| Unemployment rate | 2.7% ±3.1 pts | 2.3% | – |
| Drove alone to work | 74.0% ±12.2 pts | 82.1% | – |
| Carpooled | 10.1% ±7.5 pts | 4.4% | – |
| Public transportation | 0.0% ±11.3 pts | 0.5% | – |
| Walked | 1.4% ±1.8 pts | 2.5% | – |
| Worked from home | 13.0% ±8.4 pts | 9.6% | – |
| Mean travel time to work | 26.3 min ±5.3 | 26.2 min | −10.4 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Mondamin?
No census tract lies mostly in Mondamin; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 2902Harrison County | 3,581 | $75,588 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Mondamin) · Census block assignment files
How does Mondamin compare with other places in Iowa?
By the Census Bureau's July 2025 estimates, Mondamin is the 14,797th-most populous of the 19,476 U.S. incorporated places that have one and the 540th-most populous of 939 in Iowa.
Mondamin is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 540th | 939 |
Mondamin's figures with every place in Iowa (CSV)
Every place in Iowa, sortable · Compare Mondamin with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Mondamin?
24 of the 57 figures for Mondamin on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Mondamin are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Mondamin.