Marion, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Marion, Illinois is 16,796 as of the 2023 American Community Survey, making it the 150th-largest city in Illinois. The median household income is $57,281, the median home value is $145,300, and the median age is 40.4.
The population has declined 1.3% since 2010 (17,248 → 17,021).
16,796
Population
1166
People / sq mi
$57,281
Median Income
$145,300
Median Home Value
Marion covers 14.4 sq mi of land at 1166 people per square mile.
About Marion, IL
Marion is a city in Illinois with a population of 16,796. It ranks #150 among cities in Illinois by population. The median age is 40.4, older than the national median. The population is 47.8% male and 52.2% female.
The median household income in Marion is $57,281, below the US median of $74,580. 11.0% of residents live below the federal poverty level. Home values sit at a median of $145,300, with monthly rent averaging $878. The homeownership rate of 62.2% is lower than the national rate of 64.8%.
Educational attainment in Marion reflects 27.4% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 13.9% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 21.9 minutes each way.
Marion city Population History (2010-2024)
The city of Marion city had a population of 17,248 in 2010 and 17,021 in 2024, a -1.3% growth over 14 years. The peak was 17,757 in 2013. Average annual growth rate: -0.09%.
17,021
Population (2024)
17,248
Population (2010)
17,757
Peak (2013)
-0.09%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 17,248 |
| 2011 | 17,345 |
| 2012 | 17,359 |
| 2013 | 17,757 |
| 2014 | 17,747 |
| 2015 | 17,613 |
| 2016 | 17,657 |
| 2017 | 17,588 |
| 2018 | 17,602 |
| 2019 | 17,520 |
| 2020 | 16,831 |
| 2021 | 16,736 |
| 2022 | 16,696 |
| 2023 | 16,858 |
| 2024 | 17,021 |
Race & Ethnicity
| White | 86.2% |
| Black or African American | 5.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.4% |
| Two or More Races | 0.0% |
Economy & Income
$57,281
Median Household Income
$37,202
Per Capita Income
11.0%
Poverty Rate
2.3%
Unemployment Rate
Housing
$145,300
Median Home Value
$878
Median Rent
62.2%
Owner-Occupied
Education
93.8%
High School+
27.4%
Bachelor's+
Commute
0.1%
Drive Alone
77.2%
Public Transit
13.9%
Work From Home
21.9 min
Avg Commute
Community Profile
19.9%
Foreign Born
95.9%
Non-English at Home
10.8%
Veterans
22.9%
With Disability
92.8%
Health Insurance
89.3%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 27.9% |
| Education, Health Care & Social Services | 10.4% |
| Information | 8.4% |
| Manufacturing | 8.0% |
| Finance, Insurance & Real Estate | 7.1% |
| Arts, Entertainment & Food Services | 6.0% |
| Construction | 4.5% |
| Agriculture & Mining | 4.5% |
| Retail Trade | 4.2% |
| Public Administration | 3.2% |
| Transportation & Warehousing | 2.1% |
Largest cities in Illinois
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Part of Illinois
Metro areas in Illinois
City rankings
Frequently Asked Questions
Marion, Illinois has a population of 16,796 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 150th-largest city in Illinois.
The median household income in Marion, Illinois is $57,281, with 11.0% of residents living below the federal poverty level.
The median home value in Marion, Illinois is $145,300, with median monthly rent at $878 and a homeownership rate of 62.2%.
The median age in Marion, Illinois is 40.4 years. The population is 47.8% male and 52.2% female.
The population has declined 1.3% since 2010 (17,248 → 17,021).
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.