United States › Illinois › Thayer CITY
Thayer Illinois · 615 residents (2025 est.) · 0.61 sq mi
Time machine
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The short version
Thayer is home to 531 people in Illinois. Four-year degrees are less common here than nationally, at 10% of adults. 87% of homes are owner-occupied. The median age is 46.4, about 7 years above the US median. The typical home is worth $97,100, having risen by half since 2000. The foreign-born share is 2%.
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 from 750 in 2000
615 in 2025 (Census Bureau estimate)
from 921 / sq mi in 2009
US average: 281
from 32.6 in 2000
US average: 38.9
Population, 1990 – 2024
506 582 659 735 812 1990 2000 2010 2020 2024 Thayer Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $62,083
−19%inflation adjusted, since 2000
from $42,031 in 2000
US average: $82,259
from $20,933 in 2000
US average: $44,673
Households earning $100K+
from 33.5% in 2009
US average: 53.3%
from 5.1% in 2000
US average: 12.5%
from 0.342 in 2010
US average: 0.476
Workforce by industry, 2024
Professional, scientific, technical 8.1%
Agriculture, forestry, fishing 3.5%
Public administration 3.1%
Education & health services 2.3%
Transportation & warehousing 1.2%
Arts, entertainment, food 0.8%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
$97,100
−10%inflation adjusted, since 2000
from $59,500 in 2000
US average: $376,019
$968
+2%inflation adjusted, since 2000
from $521 in 2000
US average: $1,442
from 88.0% in 2000
13.1% rent
from 7.3% in 2009
US average: 10.0%
2.11 people
−19%since 2009
from 2.61 people in 2009
US average: 2.54
from 23.2% in 2009
US average: 22.9%
from 17.6% in 2009
US average: 47.4%
from 1.5 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 98.8%(741)
2024
White, non-Hispanic 95.5%(507)
from 0 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 3 more ancestry groups with data from 11.4% in 2000
US average: 35.6%
High school or higher
from 80.2% in 2000
US average: 89.6%
from 2.5% in 2000
US average: 14.0%
Section 06
Commute & transportation from 19.5 min in 2000
US average: 26.5
from 83.7% in 2009
US average: 68.9%
from 11.7% in 2009
US average: 8.5%
from 0.0% in 2009
US average: 3.2%
from 4.6% in 2009
US average: 15.0%
from 0.0% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 1.4% in 2009
US average: 8.3%
Section 07
Work & employment from 11.1% in 2011
US average: 5.2%
from 70.5% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 82.6% in 2020
US average: 74.6%
from 20.8% in 2009
US average: 13.1%
from 20.5% in 2009
US average: 42.5%
Section 08
People & community from 0.0% in 2009
US average: 14.1%
from 19.7% in 2009
US average: 6.2%
from 11.0% in 2012
US average: 13.3%
from 15.1% in 2013
US average: 8.4%
from 80.5% in 2017
US average: 91.0%
Computer in household
from 96.2% in 2020
US average: 95.5%
from 90.7% in 2020
US average: 87.7%
from 94.9% in 2016
US average: 77.7%
from 1.5% in 2016
US average: 13.6%
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 15.1% in 2013
US average: 8.4%
from 70.0% in 2020
US average: 54.8%
Direct-purchase
from 15.7% in 2020
US average: 13.8%
from 24.9% in 2020
US average: 18.4%
from 14.1% in 2020
US average: 20.9%
VA health care
from 3.1% in 2020
US average: 2.2%
Any private
from 81.6% in 2020
US average: 67.1%
Any public
from 37.8% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 9.8%(6)
Gulf War (1990s) 16.4%(10)
Share of the 61 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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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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