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Marion, IL
Key Indicators
A quick look at key numbers
Population
16,836
Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates
Median Age
42.2
years ∙ half population younger than 42.2, half older
Diversity Index
27.8%
chance two random people differ in race and ethnicity
Nativity
2.3%
foreign-born population
Geographic Context
Location, size, and surroundings
About
Marion is a city within Williamson County, Illinois, United States.
Co-ordinates
DEC37.734445° N, 88.941164° W
DMS37° 44′ 04.00″ N, 88° 56′ 28.19″ W
Population Density & area
1,169/sq mi
(451.4/km²)
Demographics & Living
Who lives here, how households are formed, and community composition
Population Composition
Key characteristics of the population
Sex Distribution
47.7%
male
Male
47.7%
Female
52.3%
males per 100 females
Marion
91.1
Williamson County
100.9
Illinois
97.7
Nativity
2.3%
foreign-born population
% Foreign-born
Marion
2.3%
Williamson County
2%
Illinois
14.7%
Age Distribution
How the population is spread across age groups
Median Age
42.2
years ∙ half population younger than 42.2, half older
Dependency ratio
80.3
dependents per 100 working-age adults
Marion
80.3
Williamson County
69.3
Illinois
63.5
AGE DISTRIBUTION
Distribution of age group
Median age
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Age Group | |||
| Children (Under 18) | 21% | 21.3% | 21.8% |
| Working age (18-64) | 55.5% | 59.1% | 61.2% |
| Senior (65+) | 23.5% | 19.6% | 17% |
| Dependency ratio | |||
| Total dependency ratio | 80.3 | 69.3 | 63.5 |
| Child dependency ratio | 37.9 | 36 | 35.7 |
| Old-age dependency ratio | 42.4 | 33.2 | 27.8 |
Racial & Ethnic Composition
Racial and ethnic makeup and how it compares
Race & Ethnicity
Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.
Diversity Index
27.8%
chance two random people differ in race and ethnicity
Marion
27.8%
Williamson County
22.3%
Illinois
60.5%
Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.
RACIAL & ETHNIC COMPOSITION
Race & Ethnicity
Percentage of Marion population
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Hispanic or Latino | 2.7% | 2.9% | 18.8% |
| Mexican | 0.9% | 1.9% | 14.4% |
| Puerto Rican | 1.1% | 0.4% | 1.6% |
| Cuban | 0.4% | 0.3% | 0.3% |
| Other Hispanic / Latino | 0.2% | 0.4% | 2.5% |
| Not Hispanic or Latino | 97.3% | 97.1% | 81.2% |
| One race | 94.9% | 93.9% | 77.8% |
| White | 84.5% | 87.9% | 58.1% |
| Black or African American | 8% | 4.3% | 13.3% |
| American Indian and Alaska Native | 0.1% | 0.2% | 0.1% |
| Asian | 2.4% | 1.4% | 5.9% |
| Native Hawaiian and Other Pacific Islander | 0% | 0% | 0% |
| Some Other Race | 0% | 0.1% | 0.4% |
| Two or more races (Multiracial) | 2.4% | 3.2% | 3.4% |
Household & Families Composition
Household size, type, and family structure
Household structure
53.5%
family
Family
53.5%
Non family
46.5%
% family households
Marion
53.5%
Williamson County
62.8%
Illinois
62.2%
Average household size
1.99
persons per household
Household & Family COMPOSITION
Households
Percentage of Marion population
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Total households | 8,260 | 28,983 | 5,036,449 |
| Average houshold size | 1.99 | 2.23 | 2.46 |
| Family households | 4,417 | 18,206 | 3,130,978 |
| Average family size | 2.65 | 2.76 | 3.14 |
| Married couple family | 2,943 | 13,526 | 2,282,435 |
| Other families | 1,474 | 4,680 | 848,543 |
| Male householder | 394 | 1,434 | 248,521 |
| Female householder | 1,080 | 3,246 | 600,022 |
| Non-family households | 3,843 | 10,777 | 1,905,471 |
| One-person households | 3,380 | 8,950 | 1,569,881 |
| Male householder | 1,463 | 3,726 | 712,191 |
| Senior (65+) living alone | 498 | 1,380 | 210,051 |
| Female householder | 1,917 | 5,224 | 857,690 |
| Senior (65+) living alone | 918 | 2,798 | 417,870 |
| Other living arrangements | 463 | 1,827 | 335,590 |
Housing Profile
Housing stock, ownership, rentals, and cost burdens
Total housing units
9,050
housing units
Marion
9,050
Williamson County
32,084
Illinois
5,457,452
Occupancy status
91.3%
occupied
Occupied
91.3%
Vacant
8.7%
vacancy rate
Marion
8.7%
Williamson County
9.7%
Illinois
7.7%
Housing Characteristics
How the housing supply is structured and used
Types of Housing unit
66.9%
Single family houses
Median Year Built
1983
Half of houses were built before 1983, and half after.
Note: Median year built reflects occupied units only; distribution includes all units.
Housing Characteristics
Units, rooms & bedrooms
Physical characteristics of housing units
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Rooms per unit | |||
| Median rooms | 5.3 | 5.8 | 5.6 |
| 1–3 rooms | 13.2% | 8.3% | 14.6% |
| 4–6 rooms | 59.5% | 57.1% | 50.9% |
| 7+ rooms | 27.2% | 34.6% | 34.6% |
| Bedrooms | |||
| No bedroom / studio | 2.6% | 1.2% | 3.1% |
| 1 bedroom | 8.3% | 5.1% | 11.5% |
| 2 bedrooms | 37.3% | 31.2% | 27.7% |
| 3 bedrooms | 38.2% | 45.9% | 35.8% |
| 4+ bedrooms | 13.6% | 16.6% | 21.7% |
| At a glance | |||
| Median year built | 1983 | 1982 | 1971 |
| Total housing units | 9,050 | 32,084 | 5,457,452 |
Occupancy Profile
Who is inside and how they use it
Homeownership
63.3%
owners
Renter-occupied
36.7%
Owner-occupied
63.3%
homeownership rate
Marion
63.3%
Williamson County
70.7%
Illinois
67.1%
Average household size
2.08
Owner-occupied
1.83
Renter-occupied
owner-occupied average size
Marion
2.08
Williamson County
2.32
Illinois
2.62
Housing Characteristics
Occupied unit characteristics
Tenure, crowding, and utilities
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Total occupied units | 8,260 | 28,983 | 5,036,449 |
| Year moved in | |||
| 2020 or later | 27.3% | 25.4% | 23.3% |
| 2010 to 2019 | 42.1% | 37.7% | 38.1% |
| 2000 to 2009 | 16.4% | 17.1% | 17.3% |
| 1999 or earlier | 14.3% | 19.9% | 21.3% |
| Occupants per room | |||
| 1.00 or fewer | 99.4% | 99.5% | 97.5% |
| 1.01 to 1.50 | 0.5% | 0.4% | 1.6% |
| 1.51 or more | 0.1% | 0.1% | 0.8% |
| Vehicles availability | |||
| No vehicles | 9.9% | 6% | 11% |
| 1 vehicle | 38.7% | 32.2% | 35.7% |
| 2 vehicles | 38.2% | 41.8% | 35.1% |
| 3 or more vehicles | 13.2% | 20% | 18.3% |
| House heating fuel used | |||
| Gas | 32.9% | 34.2% | 79.5% |
| Electricity | 65.7% | 64.1% | 18.6% |
| Solar | 0% | 0.1% | 0.1% |
| Fuel oil, kerosene etc | 0% | 0.1% | 0.1% |
| All other fuels | 0.8% | 1.1% | 0.8% |
| No fuel used | 0.6% | 0.4% | 0.8% |
| Selected characteristics | |||
| Lacking complete plumbing | 0.1% | 0.5% | 0.3% |
| Lacking complete kitchen | 0% | 0.5% | 0.8% |
| No telephone service available | 1.3% | 0.8% | 0.8% |
Housing Value
What owner-occupied units are worth
Median home value
$158,300
owner-occupied units
Housing Cost Burden
23.3%
of homeowners with a mortgage are cost-burdened
Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.
Financial characteristics
Property value and housing costs
Tenure, crowding, and utilities
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Property value | |||
| Median Value | $158,300 | $156,400 | $263,300 |
| Under $100,000 | 24.6% | 28.2% | 13.7% |
| $100,000 - $200,000 | 40.5% | 35.8% | 21.5% |
| $200,000 - $300,000 | 16.6% | 19.3% | 22.3% |
| $300,000 - $500,000 | 14.8% | 13.5% | 27.7% |
| $500,000 - $1,000,000 | 3.2% | 2.4% | 12.1% |
| $1,000,000 and more | 0.3% | 0.8% | 2.7% |
| Owner-occupied households | |||
| With a mortgage | 55.5% | 56.5% | 60.8% |
| Without a mortgage | 44.5% | 43.5% | 39.2% |
| Median monthly owner costs | |||
| With a mortgage | $1,233 | $1,374 | $1,987 |
| Without a mortgage | $593 | $560 | $792 |
| Gross rent | |||
| Median rent | $921 | $930 | $1,274 |
Education Profile
How educated is the community and how education pays off
Adults with a college degree
28.5%
of adults 25+ with a bachelor's degree or higher
Marion
28.5%
Williamson County
26.2%
Illinois
37.8%
Adults without a high school diploma
5.9%
of adults (25+) without a high school diploma
Marion
5.9%
Williamson County
7.2%
Illinois
9.6%
School Enrollment
Who is enrolled in school and at what level
School enrollment
3,517
population (age 3+) enrolled in school
College-going rate (18-24 yr olds)
23.2%
of 18-24-year-olds in college or graduate school
Enrollment & school type
Enrollment levels, college-going rate, and public vs private school split
Population 3+ currently enrolled in a school
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Total enrolled (age 3+) | 3,517 | 14,366 | 3,051,569 |
| Nursery / preschool | 6.9% | 7.2% | 6.3% |
| K–12 | 75.9% | 72.6% | 67.3% |
| Kindergarten | 5% | 5.5% | 4.9% |
| Elementary: Grades 1–4 | 21.4% | 21.6% | 19.5% |
| Elementary: Grades 5–8 | 31.3% | 24.2% | 20.8% |
| High School: Grades 9–12 | 18.2% | 21.3% | 22.1% |
| College or graduate school | 17.2% | 20.2% | 26.4% |
| College, undergraduate | 13.3% | 15.3% | 19.8% |
| Graduate, professional school | 3.9% | 4.9% | 6.6% |
| College-going rate · 18-24 yr olds | 23.2% | 27.7% | 41.4% |
| School type | |||
| Public school | 83.3% | 84.3% | 80.5% |
| Private school | 16.7% | 15.7% | 19.5% |
Education Attainment by Level & Gender
What is the highest level of education completed among adults
Education attainment
12,477
population 25 years and over
Attainment by gender
Male vs Female
Adults (25+) · Share within each education level
Educational Attainment Overview
Distribution and key education attainment rates for adults (25+)
Highest credential completed · adults 25+
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Population (25+) | 12,477 | 48,287 | 8,767,004 |
| Less than 9th grade | 1.6% | 1.8% | 4.6% |
| 9th–12th, no diploma | 4.3% | 5.4% | 5% |
| High school diploma or GED | 30.8% | 28.7% | 25.1% |
| Some college, no degree | 23.4% | 25.9% | 19.2% |
| Associate's degree | 11.4% | 11.9% | 8.3% |
| Bachelor's degree or higher | 28.5% | 26.2% | 37.8% |
| Bachelor's degree | 16.7% | 15.7% | 22.6% |
| Graduate or professional | 11.9% | 10.6% | 15.3% |
| High School or higher | 94.1% | 92.8% | 90.5% |
Earnings by education level
percentage as applicable
Median Earnings
$48,672
Median earnings for adults 25+, by level
Poverty Rate
4.2%
for ages 25+, with bachelors degree or higher
Outcomes by Education Level
Earnings and poverty rates across education levels (25+)
Adults 25+
| Marion | Williamson County | Illinois | |
|---|---|---|---|
| Median earnings | |||
| Population 25+, with earnings | $48,672 | $47,386 | $55,582 |
| Less than high school graduate | $28,933 | $21,310 | $34,655 |
| High school graduate (includes equivalency) | $40,481 | $41,699 | $40,965 |
| Some college or associate's degree | $41,729 | $42,393 | $47,813 |
| Bachelor's degree | $59,941 | $62,124 | $73,326 |
| Graduate or professional degree | $77,440 | $74,203 | $91,623 |
| Poverty rates | |||
| Less than high school graduate | 27% | 25.4% | 21.6% |
| High school graduate (includes equivalency) | 21.2% | 17.1% | 14.4% |
| Some college or associate's degree | 8.9% | 11.2% | 9.9% |
| Bachelor's degree or higher | 4.2% | 5.1% | 4.5% |
About Neilsberg Research
Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.
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