Knollwood vs Third Lake

A side-by-side comparison of Knollwood and Third Lake: population, income, housing, and more.

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

Knollwood has the higher population (1,907 vs 1,203 in Third Lake). Third Lake has the higher median household income ($150,893 vs $133,452 in Knollwood). Knollwood has the higher median home value ($372,500 vs $329,500 in Third Lake).

Population, income & housing

	Knollwood	Third Lake
Population	1,907	1,203
Median age	36.9 yrs	50.1 yrs
Median household income	$133,452	$150,893
Median home value	$372,500	$329,500
Median gross rent	$1,733	—
Housing units	778	501
Homeownership rate	76.8%	99.2%
Bachelor's degree or higher	45.6%	70.9%
Unemployment rate	0.0%	2.8%

Trends (ACS 5-year, 2019–2023)

	Knollwood	Third Lake
Population	1,665 → 1,907 (+14.5%)	1,079 → 1,203 (+11.5%)
Median household income	$103,750 → $133,452 (+28.6%)	$116,563 → $150,893 (+29.5%)
Median home value	$324,100 → $372,500 (+14.9%)	$267,400 → $329,500 (+23.2%)
Median gross rent	$1,545 → $1,733 (+12.2%)	$1,469 → $1,125 (-23.4%)

Knollwood

Population

1,6651,907

Median household income

$103,750$133,452

Median home value

$324,100$372,500

Median gross rent

$1,545$1,733

Third Lake

Population

1,0791,203

Median household income

$116,563$150,893

Median home value

$267,400$329,500

Median gross rent

$1,469$1,125

Age & race/ethnicity

Age distribution (share)

	Knollwood	Third Lake
Under 5	6.9%	4.5%
5 to 17	29.9%	15.0%
18 to 24	1.6%	6.0%
25 to 34	7.2%	6.7%
35 to 44	9.8%	13.6%
45 to 54	18.3%	14.7%
55 to 64	5.8%	13.5%
65 to 74	12.3%	19.3%
75 and over	8.1%	6.7%

Race & ethnicity (share)

	Knollwood	Third Lake
White (non-Hispanic)	75.6%	82.9%
Black or African American	6.1%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	1.4%	1.2%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	1.0%	1.9%
Hispanic or Latino	15.9%	14.0%

Educational attainment (age 25+)

Share of adults 25+

	Knollwood	Third Lake
No high school diploma	4.3%	0.4%
High school graduate	26.4%	8.9%
Some college or associate's	23.8%	19.8%
Bachelor's degree	32.5%	35.3%
Graduate or professional degree	13.0%	35.6%

Commute to work

How workers get to work (share)

	Knollwood	Third Lake
Drove alone	66.1%	75.6%
Carpooled	0.0%	6.5%
Public transit	0.0%	1.7%
Walked	0.0%	2.4%
Bicycle	3.4%	0.0%
Worked from home	29.3%	13.4%
Other means	1.1%	0.5%

Housing

Units in structure (share)

	Knollwood	Third Lake
1-unit, detached	86.4%	94.4%
1-unit, attached	5.1%	0.0%
2 to 4 units	0.0%	0.0%
5 to 19 units	4.0%	5.6%
20 or more units	3.3%	0.0%
Mobile home & other	1.2%	0.0%

Poverty & households

	Knollwood	Third Lake
Poverty rate	8.8%	2.2%
Average household size	2.89	2.44
Mean commute (minutes)	23	30
Median year structure built	1970	1985