Illiopolis vs Thayer

A side-by-side comparison of Illiopolis and Thayer: population, income, housing, and more.

Illiopolis and Thayer are places in Illinois. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Illiopolis has the higher population (854 vs 638 in Thayer). Illiopolis has the higher median household income ($74,219 vs $63,125 in Thayer). Illiopolis has the higher median home value ($96,500 vs $87,300 in Thayer).

Population, income & housing

	Illiopolis	Thayer
Population	854	638
Median age	45.5 yrs	43.6 yrs
Median household income	$74,219	$63,125
Median home value	$96,500	$87,300
Median gross rent	$675	$919
Housing units	383	347
Homeownership rate	80.1%	89.6%
Bachelor's degree or higher	18.4%	11.2%
Unemployment rate	2.0%	5.1%

Trends (ACS 5-year, 2019–2023)

	Illiopolis	Thayer
Population	822 → 854 (+3.9%)	786 → 638 (-18.8%)
Median household income	$64,063 → $74,219 (+15.9%)	$61,071 → $63,125 (+3.4%)
Median home value	$88,400 → $96,500 (+9.2%)	$72,400 → $87,300 (+20.6%)
Median gross rent	$625 → $675 (+8.0%)	$718 → $919 (+28.0%)

Illiopolis

Population

822854

Median household income

$64,063$74,219

Median home value

$88,400$96,500

Median gross rent

$625$675

Thayer

Population

786638

Median household income

$61,071$63,125

Median home value

$72,400$87,300

Median gross rent

$718$919

Age & race/ethnicity

Age distribution (share)

	Illiopolis	Thayer
Under 5	6.6%	4.4%
5 to 17	18.1%	16.1%
18 to 24	4.1%	6.9%
25 to 34	8.5%	10.2%
35 to 44	12.1%	13.6%
45 to 54	10.7%	13.6%
55 to 64	19.4%	13.8%
65 to 74	13.7%	13.2%
75 and over	6.8%	8.2%

Race & ethnicity (share)

	Illiopolis	Thayer
White (non-Hispanic)	93.6%	94.0%
Black or African American	2.2%	1.6%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.6%	1.7%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	2.9%	2.7%
Hispanic or Latino	0.7%	0.0%

Educational attainment (age 25+)

Share of adults 25+

	Illiopolis	Thayer
No high school diploma	10.7%	9.1%
High school graduate	47.2%	41.3%
Some college or associate's	23.7%	38.4%
Bachelor's degree	13.7%	6.9%
Graduate or professional degree	4.8%	4.3%

Commute to work

How workers get to work (share)

	Illiopolis	Thayer
Drove alone	79.4%	83.8%
Carpooled	4.4%	8.3%
Public transit	0.0%	2.5%
Walked	6.8%	0.6%
Bicycle	0.0%	0.0%
Worked from home	8.4%	4.8%
Other means	1.0%	0.0%

Housing

Units in structure (share)

	Illiopolis	Thayer
1-unit, detached	81.7%	95.4%
1-unit, attached	1.0%	0.0%
2 to 4 units	9.7%	0.0%
5 to 19 units	2.9%	0.0%
20 or more units	0.0%	0.0%
Mobile home & other	4.7%	4.6%

Poverty & households

	Illiopolis	Thayer
Poverty rate	4.3%	9.4%
Average household size	2.39	2.15
Mean commute (minutes)	24	30
Median year structure built	1955	1960