Marion, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Marion, Iowa is 41,690 as of the 2023 American Community Survey, making it the 13th-largest city in Iowa. The median household income is $87,105, the median home value is $230,800, and the median age is 40.4.
The population has grown 20.6% since 2010 (35,269 → 42,542).
41,690
Population
2316
People / sq mi
$87,105
Median Income
$230,800
Median Home Value
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Marion covers 18.0 sq mi of land at 2316 people per square mile.
About Marion, IA
Homeownership is the standout figure in Marion: 77.5% of homes are owner-occupied, higher than the national rate. Marion is a city in Iowa with a population of 41,690. It ranks #13 among cities in Iowa by population.
The typical household here earns about $87,105, above the US median of $78,538. Poverty runs at 6.1%, below the national 12.4%. Median home value is $230,800, with typical rent around $978.
Roughly 39.2% of adults have a bachelor’s, above the national 35.0%. About 16.5% of workers primarily work from home, above the national 14.0%, and the average commute runs about 19 minutes each way.
The ownership rate anchors the housing story in Marion, and tends to move with the age structure and home-value figures above.
Marion city Population History (2010-2024)
The city of Marion city had a population of 35,269 in 2010 and 42,542 in 2024, a 20.6% growth over 14 years. The peak was 42,542 in 2024. Average annual growth rate: 1.35%.
42,542
Population (2024)
35,269
Population (2010)
42,542
Peak (2024)
1.35%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 35,269 |
| 2011 | 35,824 |
| 2012 | 36,363 |
| 2013 | 36,816 |
| 2014 | 37,373 |
| 2015 | 37,926 |
| 2016 | 38,837 |
| 2017 | 39,441 |
| 2018 | 39,970 |
| 2019 | 40,359 |
| 2020 | 41,574 |
| 2021 | 41,660 |
| 2022 | 41,607 |
| 2023 | 42,127 |
| 2024 | 42,542 |
Race & Ethnicity
| White | 89.2% |
| Black or African American | 2.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.7% |
| Two or More Races | 0.0% |
Economy & Income
$87,105
Median Household Income
$43,334
Per Capita Income
6.1%
Poverty Rate
2.3%
Unemployment Rate
Housing
$230,800
Median Home Value
$978
Median Rent
77.5%
Owner-Occupied
Education
97.1%
High School+
39.2%
Bachelor's+
Commute
1.0%
Drive Alone
74.2%
Public Transit
16.5%
Work From Home
19.1 min
Avg Commute
Community Profile
21.8%
Foreign Born
96.3%
Non-English at Home
5.9%
Veterans
12.0%
With Disability
96.8%
Health Insurance
96.1%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 22.8% |
| Manufacturing | 17.3% |
| Finance, Insurance & Real Estate | 10.5% |
| Information | 10.1% |
| Education, Health Care & Social Services | 7.1% |
| Construction | 5.3% |
| Retail Trade | 5.0% |
| Public Administration | 3.0% |
| Arts, Entertainment & Food Services | 2.7% |
| Transportation & Warehousing | 1.9% |
| Agriculture & Mining | 1.1% |
Largest cities in Iowa
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City rankings
Frequently Asked Questions
Marion, Iowa has a population of 41,690 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 13th-largest city in Iowa.
The median household income in Marion, Iowa is $87,105, with 6.1% of residents living below the federal poverty level.
The median home value in Marion, Iowa is $230,800, with median monthly rent at $978 and a homeownership rate of 77.5%.
The median age in Marion, Iowa is 40.4 years. The population is 48.1% male and 51.9% female.
The population has grown 20.6% since 2010 (35,269 → 42,542).
Marion city, IA Climate
Marion city, IA has an average annual temperature of 9.3°C (49°F) and receives about 903 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.3°C
Avg Temp
903
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -7° / 19° | 28 mm |
| February | -4° / 25° | 26 mm |
| March | 3° / 37° | 57 mm |
| April | 10° / 49° | 86 mm |
| May | 16° / 61° | 103 mm |
| June | 21° / 71° | 119 mm |
| July | 24° / 75° | 110 mm |
| August | 22° / 72° | 111 mm |
| September | 18° / 64° | 105 mm |
| October | 11° / 52° | 65 mm |
| November | 3° / 37° | 54 mm |
| December | -4° / 24° | 39 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Marion city, IA
The most comfortable months to visit Marion city, IA are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -12°C low). June is usually the wettest month.
Where to stay near Marion
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.