Marion, IL Profile: Facts & Data

Marion, Illinois - Basic Facts

The City of Marion had a population of 16,723 as of July 1, 2024.

The primary coordinate point for Marion is located at latitude 37.7306 and longitude -88.9331 in Williamson County. The formal boundaries for the City of Marion encompass a land area of 16.24 sq. miles and a water area of 0.23 sq. miles. Williamson County is in the Central time zone (GMT -6).

The City of Marion has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Marion is located within West Marion Election Precinct, a minor civil division (MCD) of Williamson County.

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Marion, IL Data & Demographics (As of July 1, 2024)

POPULATION
Total Population	16,723 (100%)
Population in Households	16,260 (97.2%)
Population in Families	11,712 (70.0%)
Population in Group Quarters¹	463 ( 2.8%)
Population Density	1,161
Diversity Index²	36


INCOME
Median Household Income	$61,149
Average Household Income	$86,568
% of Income for Mortgage⁴	16%
Per Capita Income	$39,611
Wealth Index⁵	75
Socioeconomic Status Index⁶	Moderate (48.6)

HOUSING
Total HU (Housing Units)	8,858 (100%)
Owner Occupied HU	4,494 (50.7%)
Renter Occupied HU	3,147 (35.5%)
Vacant Housing Units	1,217 (13.7%)
Median Home Value	$159,742
Average Home Value	$217,991
Housing Affordability Index³	137

HOUSEHOLDS
Total Households	7,641
Average Household Size	2.13
Family Households	4,161
Average Family Size	3.00

HOUSING

Total HU (Housing Units)

8,858 (100%)

Owner Occupied HU

4,494 (50.7%)

Renter Occupied HU

3,147 (35.5%)

Vacant Housing Units

1,217 (13.7%)

Median Home Value

$159,742

Average Home Value

$217,991

Housing Affordability Index³

137

HOUSEHOLDS

Total Households

7,641

Average Household Size

2.13

Family Households

4,161

Average Family Size

3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR	2020-2024	2024-2029
Population	-0.18%	-0.05%
Households	0.29%	0.51%
Families		0.39%
Median Household Income		3.06%
Per Capita Income		3.23%
Owner Occupied HU		1.67%

GROWTH RATE / YEAR

2020-2024

2024-2029

Population

-0.18%

-0.05%

Households

0.29%

0.51%

Families

0.39%

Median Household Income

3.06%

Per Capita Income

3.23%

Owner Occupied HU

1.67%

Marion, IL - Peer Comparisons by Rank and Percentile

The table below compares Marion to the other 1,462 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2024 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description	Rank	Percentile
Total Population	# 151	90th
Population Density	# 588	60th
Median Household Income	# 1013	31st
Housing Affordability Index	# 735	50th
Per Capita Income	# 645	56th
Diversity Index	# 428	71st

Variable Description

Rank

Percentile

Total Population

# 151

90th

Population Density

# 588

60th

Median Household Income

# 1013

31st

Housing Affordability Index

# 735

50th

Per Capita Income

# 645

56th

Diversity Index

# 428

71st

Illinois Census Data Comparison Tool

Marion, IL Profile: Facts & Data

Marion, Illinois - Basic Facts

Marion, IL Data & Demographics (As of July 1, 2024)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Marion, IL - Peer Comparisons by Rank and Percentile

Marion, IL - Most Popular Things to Do

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Williamson County