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CITY

Mark

Illinois · 505 residents (2025 est.) · 1.065 sq mi
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The short version

Mark has roughly average household income, with a median household income of $79,063. Population has grown 17% since 2000. 22% of adults hold a bachelor's degree or higher, below the national rate of 36%. Median home value has more than doubled since 2000, reaching $161,600. With a median age of 45.0, the population is older than the US median of 38.9.

At a glance
Average income
near the US median
US median: $82,259
Older
median age 45.0
US median: 38.9
Less educated
22% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
574
+17%since 2000
from 491 in 2000
1990 – 2025
Population density
539 / sq mi
+17%since 2000
from 461 / sq mi in 2000
US average: 281
Median age
45.0
+22%since 2000
from 36.9 in 2000
US average: 38.9

PEP 2025 EST:505 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
3744445145846541990201020202024Mark
2024574
1990201020202024
Section 02

Income & economy

Median household income
$79,063
−4%inflation adjusted, since 2000
from $45,208 in 2000
US average: $82,259
1990 – 2024
Per capita income
$39,141
+107%since 2000
from $18,912 in 2000
US average: $44,673
Households earning $100K+
51.9%
+30.5 ptssince 2009
from 21.3% in 2009
US average: 53.3%
Poverty rate
10.5%
+0.2 ptssince 2000
from 10.3% in 2000
US average: 12.5%
Income inequality (Gini)
0.369
−2%since 2010
from 0.376 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade19%
US avg: 9.9%
Information16.5%
US avg: 10.8%
Finance & insurance10.8%
US avg: 5.9%
Professional, scientific, technical10%
US avg: 5.1%
Transportation & warehousing6.8%
US avg: 2.2%
Other services5%
US avg: 6.7%
Public administration5%
US avg: 4.8%
Wholesale trade4.7%
US avg: 6.9%
Agriculture, forestry, fishing1.4%
US avg: 1.6%
Manufacturing1.4%
US avg: 0.4%
Education & health services0.7%
US avg: 0.9%
Construction0%
US avg: 1.2%
Arts, entertainment, food0%
US avg: 1.9%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$161,600
+18%inflation adjusted, since 2000
from $75,000 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$938
−2%inflation adjusted, since 2000
from $525 in 2000
US average: $1,442
Owner-occupied
74.4%
−12.0 ptssince 2000
from 86.5% in 2000
25.6% rent
Vacancy rate
10.6%
Unchangedsince 2009
from 10.6% in 2009
US average: 10.0%
Owner cost-burdened
16.9%
+3.0 ptssince 2009
from 13.9% in 2009
US average: 22.9%
Renter cost-burdened
47.8%
+21.5 ptssince 2009
from 26.3% in 2009
US average: 47.4%
Afford Score
2.0
+23%since 2000
from 1.7 in 2000
1990 – 2024
Gentrification Score
54
RELATED:See current rent listings in Mark on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic95.3%(468)
Black0%(0)
Hispanic / Latino4.7%(23)
Asian0%(0)
Other0%
Diversity Score11.2%(55)
2024
White, non-Hispanic89.5%(514)
Black0%(0)
Hispanic / Latino10.3%(59)
Asian0%(0)
Other0.2%(1)
Diversity Score23.4%(135)
Diversity Score
23
+110%since 2000
from 11 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
22.1%
+11.2 ptssince 2000
from 10.9% in 2000
US average: 35.6%
High school or higher
96.4%
+12.9 ptssince 2000
from 83.5% in 2000
US average: 89.6%
Graduate degree
4.9%
+3.6 ptssince 2000
from 1.2% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
19.8 min
+32%since 2000
from 15.0 min in 2000
US average: 26.5
Drive alone to work
81.0%
−5.5 ptssince 2009
from 86.5% in 2009
US average: 68.9%
Carpooled to work
8.1%
−5.3 ptssince 2009
from 13.5% in 2009
US average: 8.5%
Public transit
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 3.2%
Worked from home
8.1%
+8.1 ptssince 2009
from 0.0% in 2009
US average: 15.0%
Walked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
2.2%
−2.5 ptssince 2009
from 4.7% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
2.4%
+1.0 ptssince 2011
from 1.4% in 2011
US average: 5.2%
Labor force participation
64.1%
−8.1 ptssince 2011
from 72.2% in 2011
US average: 63.5%
Self-employed
19.4%
+9.2 ptssince 2009
from 10.2% in 2009
US average: 13.1%
Management & professional
29.7%
−34.3 ptssince 2009
from 64.0% in 2009
US average: 42.5%
Section 08

People & community

Male
60.6%
+18.0 ptssince 2009
from 42.6% in 2009
Female
39.4%
−18.0 ptssince 2009
from 57.4% in 2009
Foreign born
1.7%
+1.3 ptssince 2009
from 0.4% in 2009
US average: 14.1%
Veterans
7.3%
−35.8 ptssince 2009
from 43.1% in 2009
US average: 6.2%
With a disability
16.2%
+6.5 ptssince 2012
from 9.7% in 2012
US average: 13.3%
Uninsured
1.2%
−82.7 ptssince 2013
from 83.9% in 2013
US average: 8.4%
Broadband at home
89.6%
+11.0 ptssince 2017
from 78.6% in 2017
US average: 91.0%
English only at home
98.2%
+8.6 ptssince 2016
from 89.6% in 2016
US average: 77.7%
Spanish at home
0.0%
−10.0 ptssince 2016
from 10.0% in 2016
US average: 13.6%
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MARK VS
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MARK VS
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MARK VS
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Frequently asked

How many people live in Mark, Illinois?

Mark, Illinois has about 574 residents according to the 2024 American Community Survey.

What is the median household income in Mark, Illinois?

The typical household in Mark, Illinois earns about $79,063 a year. Half of households make more than that, and half make less.

Is Mark, Illinois expensive?

In Mark, Illinois, the median home is worth about $161,600, and the typical rent is about $938 a month.

How educated are people in Mark, Illinois?

About 22.1% of adults age 25 and over in Mark, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Mark, Illinois?

About 10.5% of people in Mark, Illinois live below the federal poverty line.

Has Mark, Illinois grown since 1990?

Yes, Mark, Illinois has grown since 1990. The population has added about 177 residents, a change of about 45 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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