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CITY

Thayer

Illinois · 615 residents (2025 est.) · 0.61 sq mi
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The short version

Thayer has lower-than-average household income, with a median household income of $62,083. Population has fallen 29% since 2000, a loss of 219 residents. 10% of adults hold a bachelor's degree or higher, below the national rate of 36%. Median home value has risen by half since 2000, reaching $97,100. With a median age of 46.4, the population is older than the US median of 38.9. Households here earn about 26% less than the Illinois median.

At a glance
Lower income
below the US median
US median: $82,259
Older
median age 46.4
US median: 38.9
Less educated
10% hold a bachelor's degree
US average: 36%
More affordable
home values down 10%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
531
−29%since 2000
from 750 in 2000
1990 – 2025
Population density
870 / sq mi
−29%since 2000
from 1,230 / sq mi in 2000
US average: 281
Median age
46.4
+42%since 2000
from 32.6 in 2000
US average: 38.9

PEP 2025 EST:615 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
5065826597358121990201020202024Thayer
2024531
1990201020202024
Section 02

Income & economy

Median household income
$62,083
−19%inflation adjusted, since 2000
from $42,031 in 2000
US average: $82,259
1990 – 2024
Per capita income
$39,425
+88%since 2000
from $20,933 in 2000
US average: $44,673
Households earning $100K+
42.1%
+8.6 ptssince 2009
from 33.5% in 2009
US average: 53.3%
Poverty rate
10.5%
+5.4 ptssince 2000
from 5.1% in 2000
US average: 12.5%
Income inequality (Gini)
0.389
+14%since 2010
from 0.342 in 2010
US average: 0.476
Workforce by industry, 2024
Information17.3%
US avg: 10.8%
Retail trade16.5%
US avg: 9.9%
Finance & insurance10.4%
US avg: 5.9%
Professional, scientific, technical8.1%
US avg: 5.1%
Wholesale trade6.9%
US avg: 6.9%
Agriculture, forestry, fishing3.5%
US avg: 1.6%
Construction3.5%
US avg: 1.2%
Other services3.1%
US avg: 6.7%
Public administration3.1%
US avg: 4.8%
Education & health services2.3%
US avg: 0.9%
Transportation & warehousing1.2%
US avg: 2.2%
Arts, entertainment, food0.8%
US avg: 1.9%
Manufacturing0%
US avg: 0.4%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$97,100
−10%inflation adjusted, since 2000
from $59,500 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$968
+2%inflation adjusted, since 2000
from $521 in 2000
US average: $1,442
Owner-occupied
86.9%
−1.1 ptssince 2000
from 88.0% in 2000
13.1% rent
Vacancy rate
12.8%
+5.5 ptssince 2009
from 7.3% in 2009
US average: 10.0%
Owner cost-burdened
11.0%
−12.3 ptssince 2009
from 23.2% in 2009
US average: 22.9%
Renter cost-burdened
45.5%
+27.8 ptssince 2009
from 17.6% in 2009
US average: 47.4%
Afford Score
1.6
+10%since 2000
from 1.4 in 2000
1990 – 2024
Gentrification Score
12
RELATED:See current rent listings in Thayer on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic98.8%(741)
Black0.1%(1)
Hispanic / Latino0.8%(6)
Asian0%(0)
Other0%
Diversity Score2.3%(17)
2024
White, non-Hispanic95.5%(507)
Black1.3%(7)
Hispanic / Latino0%(0)
Asian1.1%(6)
Other2.1%(11)
Diversity Score11%(58)
Diversity Score
11
+372%since 2000
from 2 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
10.3%
−1.1 ptssince 2000
from 11.4% in 2000
US average: 35.6%
High school or higher
91.0%
+10.9 ptssince 2000
from 80.2% in 2000
US average: 89.6%
Graduate degree
3.6%
+1.1 ptssince 2000
from 2.5% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
30.4 min
+56%since 2000
from 19.5 min in 2000
US average: 26.5
Drive alone to work
85.1%
+1.4 ptssince 2009
from 83.7% in 2009
US average: 68.9%
Carpooled to work
6.5%
−5.2 ptssince 2009
from 11.7% in 2009
US average: 8.5%
Public transit
3.4%
+3.4 ptssince 2009
from 0.0% in 2009
US average: 3.2%
Worked from home
4.2%
−0.4 ptssince 2009
from 4.6% in 2009
US average: 15.0%
Walked to work
0.8%
+0.8 ptssince 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
2.4%
+1.0 ptssince 2009
from 1.4% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
4.4%
−6.7 ptssince 2011
from 11.1% in 2011
US average: 5.2%
Labor force participation
62.4%
−8.1 ptssince 2011
from 70.5% in 2011
US average: 63.5%
Self-employed
9.2%
−11.6 ptssince 2009
from 20.8% in 2009
US average: 13.1%
Management & professional
30.4%
−26.2 ptssince 2009
from 56.6% in 2009
US average: 42.5%
Section 08

People & community

Male
44.3%
−4.3 ptssince 2009
from 48.6% in 2009
Female
55.7%
+4.3 ptssince 2009
from 51.4% in 2009
Foreign born
1.9%
+1.9 ptssince 2009
from 0.0% in 2009
US average: 14.1%
Veterans
14.3%
−34.8 ptssince 2009
from 49.1% in 2009
US average: 6.2%
With a disability
17.1%
+6.1 ptssince 2012
from 11.0% in 2012
US average: 13.3%
Uninsured
2.1%
−82.8 ptssince 2013
from 84.9% in 2013
US average: 8.4%
Broadband at home
91.3%
+10.8 ptssince 2017
from 80.5% in 2017
US average: 91.0%
English only at home
97.8%
+3.0 ptssince 2016
from 94.9% in 2016
US average: 77.7%
Spanish at home
0.0%
−1.5 ptssince 2016
from 1.5% in 2016
US average: 13.6%
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THAYER VS
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THAYER VS
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THAYER VS
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Frequently asked

How many people live in Thayer, Illinois?

Thayer, Illinois has about 531 residents according to the 2024 American Community Survey.

What is the median household income in Thayer, Illinois?

The typical household in Thayer, Illinois earns about $62,083 a year. Half of households make more than that, and half make less.

Is Thayer, Illinois expensive?

In Thayer, Illinois, the median home is worth about $97,100, and the typical rent is about $968 a month.

How educated are people in Thayer, Illinois?

About 10.3% of adults age 25 and over in Thayer, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Thayer, Illinois?

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

Has Thayer, Illinois grown since 1990?

Yes, Thayer, Illinois has shrunk since 1990. The population has lost about 204 residents, a change of about -28 percent over that period.

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

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