Cahokia Heights vs O'Fallon

A side-by-side comparison of Cahokia Heights and O'Fallon: population, income, housing, and more.

Cahokia Heights and O'Fallon are places in Illinois. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

O'Fallon has the higher population (32,139 vs 17,173 in Cahokia Heights). O'Fallon has the higher median household income ($102,793 vs $37,975 in Cahokia Heights). O'Fallon has the higher median home value ($274,100 vs $56,900 in Cahokia Heights).

Population, income & housing

	Cahokia Heights	O'Fallon
Population	17,173	32,139
Median age	32.8 yrs	36.9 yrs
Median household income	$37,975	$102,793
Median home value	$56,900	$274,100
Median gross rent	$959	$1,312
Housing units	8,617	13,152
Homeownership rate	52.6%	70.9%
Bachelor's degree or higher	11.9%	51.3%
Unemployment rate	9.3%	3.3%

Trends (ACS 5-year, 2019–2023)

	Cahokia Heights	O'Fallon
Population	17,753 → 17,173 (-3.3%)	29,333 → 32,139 (+9.6%)
Median household income	$30,488 → $37,975 (+24.6%)	$90,349 → $102,793 (+13.8%)
Median home value	$53,100 → $56,900 (+7.2%)	$207,900 → $274,100 (+31.8%)
Median gross rent	$937 → $959 (+2.3%)	$1,066 → $1,312 (+23.1%)

Cahokia Heights

Population

17,75317,173

Median household income

$30,488$37,975

Median home value

$53,100$56,900

Median gross rent

$937$959

O'Fallon

Population

29,33332,139

Median household income

$90,349$102,793

Median home value

$207,900$274,100

Median gross rent

$1,066$1,312

Age & race/ethnicity

Age distribution (share)

	Cahokia Heights	O'Fallon
Under 5	9.6%	7.5%
5 to 17	23.3%	21.2%
18 to 24	7.3%	5.3%
25 to 34	12.8%	13.2%
35 to 44	11.0%	14.9%
45 to 54	8.7%	12.9%
55 to 64	13.9%	9.5%
65 to 74	8.4%	8.8%
75 and over	5.0%	6.9%

Race & ethnicity (share)

	Cahokia Heights	O'Fallon
White (non-Hispanic)	20.3%	70.3%
Black or African American	71.1%	13.5%
American Indian & Alaska Native	0.6%	0.1%
Asian	1.0%	2.9%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.4%	0.3%
Two or more races	4.6%	6.9%
Hispanic or Latino	2.1%	6.0%

Educational attainment (age 25+)

Share of adults 25+

	Cahokia Heights	O'Fallon
No high school diploma	15.0%	3.1%
High school graduate	39.8%	14.7%
Some college or associate's	33.4%	31.0%
Bachelor's degree	6.5%	27.9%
Graduate or professional degree	5.3%	23.3%

Commute to work

How workers get to work (share)

	Cahokia Heights	O'Fallon
Drove alone	68.6%	75.2%
Carpooled	12.0%	5.4%
Public transit	7.7%	0.4%
Walked	1.1%	1.1%
Bicycle	0.0%	0.1%
Worked from home	7.1%	16.7%
Other means	3.5%	1.1%

Housing

Units in structure (share)

	Cahokia Heights	O'Fallon
1-unit, detached	78.6%	69.8%
1-unit, attached	1.6%	7.4%
2 to 4 units	8.4%	5.1%
5 to 19 units	4.1%	8.7%
20 or more units	3.9%	6.6%
Mobile home & other	3.5%	2.3%

Poverty & households

	Cahokia Heights	O'Fallon
Poverty rate	32.7%	4.4%
Average household size	2.69	2.58
Mean commute (minutes)	28	26
Median year structure built	1963	1995