Cortland vs Somonauk

A side-by-side comparison of Cortland and Somonauk: population, income, housing, and more.

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

Cortland has the higher population (4,556 vs 1,592 in Somonauk). Cortland has the higher median household income ($82,750 vs $81,731 in Somonauk). Somonauk has the higher median home value ($221,500 vs $203,700 in Cortland).

Population, income & housing

	Cortland	Somonauk
Population	4,556	1,592
Median age	31.9 yrs	46.1 yrs
Median household income	$82,750	$81,731
Median home value	$203,700	$221,500
Median gross rent	$1,420	$883
Housing units	1,631	692
Homeownership rate	77.0%	72.2%
Bachelor's degree or higher	31.1%	22.7%
Unemployment rate	6.1%	4.1%

Trends (ACS 5-year, 2019–2023)

	Cortland	Somonauk
Population	4,124 → 4,556 (+10.5%)	2,125 → 1,592 (-25.1%)
Median household income	$84,900 → $82,750 (-2.5%)	$65,139 → $81,731 (+25.5%)
Median home value	$156,100 → $203,700 (+30.5%)	$168,900 → $221,500 (+31.1%)
Median gross rent	$1,218 → $1,420 (+16.6%)	$988 → $883 (-10.6%)

Cortland

Population

4,1244,556

Median household income

$84,900$82,750

Median home value

$156,100$203,700

Median gross rent

$1,218$1,420

Somonauk

Population

2,1251,592

Median household income

$65,139$81,731

Median home value

$168,900$221,500

Median gross rent

$988$883

Age & race/ethnicity

Age distribution (share)

	Cortland	Somonauk
Under 5	6.3%	4.2%
5 to 17	18.3%	16.0%
18 to 24	11.2%	8.1%
25 to 34	19.4%	10.8%
35 to 44	16.1%	8.9%
45 to 54	9.4%	15.3%
55 to 64	11.2%	12.9%
65 to 74	3.5%	14.9%
75 and over	4.6%	8.9%

Race & ethnicity (share)

	Cortland	Somonauk
White (non-Hispanic)	71.4%	90.7%
Black or African American	9.1%	0.9%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.0%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	1.5%
Two or more races	2.1%	2.6%
Hispanic or Latino	17.4%	4.2%

Educational attainment (age 25+)

Share of adults 25+

	Cortland	Somonauk
No high school diploma	5.9%	3.8%
High school graduate	30.3%	37.1%
Some college or associate's	32.7%	36.5%
Bachelor's degree	17.6%	15.2%
Graduate or professional degree	13.5%	7.4%

Commute to work

How workers get to work (share)

	Cortland	Somonauk
Drove alone	83.3%	84.3%
Carpooled	7.5%	3.2%
Public transit	2.6%	2.6%
Walked	0.5%	2.3%
Bicycle	0.0%	0.3%
Worked from home	6.0%	6.4%
Other means	0.0%	0.9%

Housing

Units in structure (share)

	Cortland	Somonauk
1-unit, detached	67.4%	68.5%
1-unit, attached	12.3%	15.2%
2 to 4 units	5.2%	8.5%
5 to 19 units	15.1%	4.2%
20 or more units	0.0%	3.6%
Mobile home & other	0.0%	0.0%

Poverty & households

	Cortland	Somonauk
Poverty rate	8.0%	5.9%
Average household size	2.89	2.40
Mean commute (minutes)	27	28
Median year structure built	1996	1971