City · Iowa
Martensdale, Iowa
Martensdale, city, in Warren County, Iowa. Martensdale had 426 residents on July 1, 2025 by the Census Bureau's estimate, up 0.2% since 2020; the 2020 Census counted 421 and the ACS 2020-2024 5-year estimates put it at 569 (±135). GEOID 1949890.
Residents, July 2025 estimate
426
Census Bureau estimate (no margin published)
2020 Census count: 421 · ACS 2020-2024: 569 ±135
Median household income
$57,500
±$13,624 (90% margin)
Iowa: $75,059
Median home value
$181,400
±$11,688 (90% margin)
Iowa: $208,000
Median gross rent
$858
±$36 (90% margin)
Iowa: $972
Where is Martensdale and what county is it in?
Martensdale is a city in Warren County, Iowa. It covers 0.4 square miles of land, 1,108 residents per square mile in 2020.
Martensdale is in the Des Moines-West Des Moines, IA metropolitan statistical area, which takes in 6 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 Martensdale, and is it growing?
The Census Bureau estimates that 426 people lived in Martensdale on July 1, 2025, up 0.2% since 2020, slower than Iowa (+1.5%). The 2020 Census counted 421 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 569 (±135).
| Measure | Martensdale | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 569 ±135 | 54,409 | no clear change |
| Households | 238 ±51 | 20,679 | no clear change |
| Average household size | 2.39 ±0.42 | 2.55 | no clear change |
| Housing units | 251 ±52 | 21,921 | no clear change |
Martensdale's population since 2000
From 467 in 2000 to 426 in 2025: down 8.8%. The 2000, 2010 and 2020 figures are census counts, each for Martensdale 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 Martensdale?
The median resident of Martensdale is 30.3 years old; 27.2% are under 18 and 18.3% are 65 or older. The largest group is non-Hispanic white residents at 88.9%, then non-Hispanic residents of two or more races at 6.5%.
| Measure | Martensdale | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 30.3 ±10.2 | 38.8 | no clear change |
| Under 18 years | 27.2% ±7.0 pts | 24.4% | – |
| 65 years and over | 18.3% ±7.6 pts | 16.7% | – |
| Male | 51.8% ±5.9 pts | 49.7% | – |
| Hispanic or Latino (any race) | 3.3% ±3.3 pts | 3.7% | – |
| White alone, not Hispanic | 88.9% ±8.8 pts | 91.9% | no clear change |
| Black or African American alone, not Hispanic | 1.1% ±2.1 pts | 0.7% | – |
| Asian alone, not Hispanic | 0.0% ±4.3 pts | 0.7% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.2% ±0.5 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±4.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 6.5% ±7.0 pts | 2.8% | – |
| Some other race alone, not Hispanic | 0.0% ±4.3 pts | 0.1% | – |
| Born outside the United States | 0.7% ±0.8 pts | 1.5% | – |
| Speak a language other than English at home (age 5+) | 0.8% ±1.2 pts | 2.9% | – |
| Civilian veterans (age 18+) | 4.8% ±2.5 pts | 6.7% | – |
| With a disability | 19.0% ±6.7 pts | 11.6% | – |
| No health insurance coverage | 2.5% ±2.3 pts | 2.0% | – |
| High school graduate or higher (age 25+) | 94.2% ±5.2 pts | 96.7% | – |
| Bachelor's degree or higher (age 25+) | 15.6% ±6.3 pts | 33.3% | no clear change |
| Graduate or professional degree (age 25+) | 0.8% ±1.1 pts | 9.7% | – |
| Lived in the same house a year earlier | 91.8% ±6.0 pts | 89.0% | – |
| Moved from another state in the past year | 0.0% ±4.4 pts | 1.0% | – |
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 Martensdale earn?
Half of Martensdale's 238 households earn less than $57,500 a year (±$13,624), against $94,588 in Warren County and $75,059 in Iowa. In 2015-2019 it was $69,740 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Martensdale | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $57,500 ±$13,624 | $94,588 | no clear change |
| Mean household income | $69,582 ±$13,225 | $111,331 | – |
| Per capita income | $29,418 ±$4,899 | $43,596 | no clear change |
| People below the poverty line | 10.2% ±8.3 pts | 5.1% | – |
| Children under 18 below the poverty line | 5.2% ±6.5 pts | 3.1% | – |
| Households receiving SNAP | 8.0% ±5.0 pts | 6.1% | – |
| Households with a computer | 96.6% ±3.6 pts | 96.6% | – |
| Households with a broadband subscription | 94.5% ±5.2 pts | 91.8% | – |
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 Martensdale?
Owners occupy 71.8% of Martensdale's occupied homes and renters 28.2%. The median owner-occupied home is valued at $181,400 by its owner (±$11,688). The median renter pays $858 a month including utilities, and 41.0% of renters pay 35% or more of their income on rent.
| Measure | Martensdale | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $181,400 ±$11,688 | $269,600 | no clear change |
| Median gross rent | $858 ±$36 | $973 | no clear change |
| Renters paying 35% or more of income on rent | 41.0% ±25.0 pts | 31.1% | no clear change |
| Median monthly owner costs, with a mortgage | $1,301 ±$308 | $1,816 | – |
| Owner-occupied homes | 71.8% ±9.9 pts | 82.3% | no clear change |
| Renter-occupied homes | 28.2% ±9.9 pts | 17.7% | – |
| Housing units | 251 ±52 | 21,921 | no clear change |
| Homeowner vacancy rate | 0.0% ±13.6 pts | 0.7% | – |
| Rental vacancy rate | 9.5% ±16.0 pts | 9.7% | – |
| Single-family detached homes | 81.7% ±8.8 pts | 76.7% | – |
| Mobile homes | 0.0% ±9.5 pts | 3.3% | – |
| Built 2020 or later | 0.0% ±9.5 pts | 3.2% | – |
| Built 2010 to 2019 | 2.0% ±3.5 pts | 15.8% | – |
| Built 1939 or earlier | 13.5% ±7.5 pts | 10.9% | – |
| Households with no vehicle | 2.9% ±3.2 pts | 3.3% | – |
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 Martensdale building?
Builders took permits for 0 new housing units in Martensdale in 2025 (0 in single-family houses), 0.0 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 Martensdale work and get to work?
73.8% of Martensdale's workers drive alone and 13.1% work from home. The average trip to work takes 30.1 minutes.
| Measure | Martensdale | Warren County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 66.9% ±10.7 pts | 68.7% | – |
| Unemployment rate | 2.1% ±1.9 pts | 3.4% | – |
| Drove alone to work | 73.8% ±8.7 pts | 76.0% | – |
| Carpooled | 6.2% ±5.4 pts | 5.2% | – |
| Public transportation | 0.0% ±8.7 pts | 0.0% | – |
| Walked | 6.2% ±6.2 pts | 2.5% | – |
| Worked from home | 13.1% ±5.4 pts | 15.3% | – |
| Mean travel time to work | 30.1 min ±7.8 | 24.1 min | no clear change |
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 Martensdale?
No census tract lies mostly in Martensdale; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 212Warren County | 4,195 | $101,016 |
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 Martensdale) · Census block assignment files
How does Martensdale compare with other places in Iowa?
By the Census Bureau's July 2025 estimates, Martensdale is the 13,859th-most populous of the 19,476 U.S. incorporated places that have one and the 474th-most populous of 939 in Iowa.
Martensdale 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 | 474th | 939 |
Martensdale's figures with every place in Iowa (CSV)
Every place in Iowa, sortable · Compare Martensdale 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 Martensdale?
24 of the 57 figures for Martensdale 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 Martensdale 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 Martensdale.