Census tract · Lake County

Census Tract 8646.01, Lake County, Illinois

Census Tract 8646.01, GEOID 17097864601, in Lake County, Illinois, entirely within Lake Forest and West Deerfield Township. 3,627 residents in the ACS 2020-2024 5-year estimates (±344); the 2020 Census counted 3,606.

Residents, 2020-2024

3,627

±344 (90% margin)
2020 Census count: 3,606

Median household income

$250,000 or more

The survey's top or bottom value; no margin is published
Lake County: $110,416

Median home value

$1,108,000

±$87,690 (90% margin)
Lake County: $345,700

Median gross rent

$1,475

±$485 (90% margin)
Lake County: $1,477

Where is Census Tract 8646.01?

Census Tract 8646.01 is one of 160 census tracts in Lake County, Illinois. It covers 4.17 square miles of land, 865 residents per square mile in 2020. Its GEOID, 17097864601, names it uniquely (how tract numbers and GEOIDs work).

Places Census Tract 8646.01 lies in (share of its 2020 census blocks)
Place	Share of the tract
Lake Forest	100%
West Deerfield Township	100%

Census Tract 8646.01 (marked with a dot) in Lake County, Illinois. Boundaries: Census Bureau 2024.

Census Tract 8646.01 (shaded) and the tracts that border it, numbered. Boundaries: Census Bureau 2024 cartographic boundary file, 1:500,000.

5 census tracts border Census Tract 8646.01: Tract 8635 ($197,431), Tract 8646.02 ($250,000 or more), Tract 8647 ($220,156), Tract 8648.01 ($215,765) and Tract 8662 ($177,500). The figure in brackets is each tract's median household income.

Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.

Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files

How many people live in Census Tract 8646.01?

The 2020-2024 American Community Survey puts Census Tract 8646.01's population at 3,627 (±344) in 1,215 households; the 2020 Census counted 3,606 residents and 1,351 housing units.

Counts, ACS 2020-2024 5-year estimates
Measure	Tract 8646.01	Lake Forest	Lake County	Illinois
Total population	3,627±344	19,416	714,223	12,694,798
Households	1,215±125	6,900	258,455	5,036,449
Average household size	2.98±0.19	2.63	2.69	2.46
Housing units	1,267±121	7,282	270,618	5,457,452

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov

Who lives in Census Tract 8646.01?

The median resident of Census Tract 8646.01 is 51.4 years old; 20.3% are under 18 and 27.5% are 65 or older. The largest group is non-Hispanic white residents at 78.5%, then non-Hispanic Asian residents at 11.1%. 12.9% of residents were born outside the United States.

Age, origin, education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Tract 8646.01	Lake Forest	Lake County	Illinois
Median age	51.4±3.9	46.1	39.1	39.0
Under 18 years	20.3%±3.2 pts	19.2%	23.3%	21.8%
65 years and over	27.5%±4.1 pts	26.7%	15.8%	17.0%
Hispanic or Latino (any race)	6.1%±3.0 pts	6.1%	24.9%	18.8%
White alone, not Hispanic	78.5%±7.8 pts	80.2%	56.2%	58.1%
Black or African American alone, not Hispanic	0.2%±0.4 pts	1.0%	6.3%	13.3%
Asian alone, not Hispanic	11.1%±6.1 pts	6.4%	8.6%	5.9%
American Indian and Alaska Native alone, not Hispanic	0.0%±1.0 pts	0.0%	0.1%	0.1%
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±1.0 pts	0.0%	0.0%	0.0%
Two or more races, not Hispanic	4.1%±2.8 pts	5.4%	3.3%	3.4%
Some other race alone, not Hispanic	0.0%±1.0 pts	0.9%	0.6%	0.4%
Born outside the United States	12.9%±5.9 pts	10.8%	19.8%	14.7%
Speak a language other than English at home (age 5+)	11.9%±6.5 pts	13.0%	31.4%	24.0%
Civilian veterans (age 18+)	2.8%±1.5 pts	2.7%	4.7%	4.8%
With a disability	6.2%±2.2 pts	12.9%	9.8%	12.1%
No health insurance coverage	3.1%±2.6 pts	1.8%	6.9%	6.9%
High school graduate or higher (age 25+)	98.7%±1.1 pts	98.1%	90.6%	90.5%
Bachelor's degree or higher (age 25+)	81.0%±5.0 pts	80.5%	47.7%	37.8%
Graduate or professional degree (age 25+)	38.3%±6.0 pts	41.9%	20.1%	15.3%
Lived in the same house a year earlier	84.0%±5.3 pts	84.4%	88.4%	88.9%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov

What do households in Census Tract 8646.01 earn?

Half of the 1,215 households in Census Tract 8646.01 earn less than $250,000 or more a year (), against $110,416 across Lake County: 1st highest of the county's 155 tracts with a reliable estimate.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Tract 8646.01	Lake Forest	Lake County	Illinois
Median household income	$250,000 or more	$235,081	$110,416	$83,390
Mean household income	$350,703±$44,964	$303,251	$155,726	$115,638
Per capita income	$119,679±$15,425	$109,918	$57,153	$46,406
People below the poverty line	4.9%±4.3 pts	3.5%	8.3%	11.8%
Children under 18 below the poverty line	8.3%±11.7 pts	4.0%	11.5%	15.1%
Households receiving SNAP	2.2%±2.5 pts	1.4%	9.4%	13.8%
Households with a computer	99.3%±1.1 pts	98.2%	97.2%	95.2%
Households with a broadband subscription	98.5%±1.6 pts	95.4%	94.3%	90.8%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What does housing cost in Census Tract 8646.01?

Owners occupy 94.5% of Census Tract 8646.01's occupied homes and renters 5.5%. The median owner-occupied home is valued at $1,108,000 by its owner (±$87,690). The median renter pays $1,475 a month including utilities.

Housing, ACS 2020-2024 5-year estimates
Measure	Tract 8646.01	Lake Forest	Lake County	Illinois
Median home value (owner-occupied)	$1,108,000±$87,690	$938,300	$345,700	$263,300
Median gross rent	$1,475±$485	$1,815	$1,477	$1,274
Renters paying 35% or more of income on rent	26.3%±38.7 pts	32.9%	40.1%	39.0%
Median monthly owner costs, with a mortgage	$4,000 or more	$4,000 or more	$2,503	$1,987
Owner-occupied homes	94.5%±2.9 pts	88.8%	74.8%	67.1%
Renter-occupied homes	5.5%±2.9 pts	11.2%	25.2%	32.9%
Housing units	1,267±121	7,282	270,618	5,457,452
Single-family detached homes	86.4%±6.3 pts	76.6%	66.6%	58.2%
Mobile homes	0.0%±2.9 pts	0.1%	1.6%	2.3%
Built 2020 or later	1.2%±1.7 pts	0.7%	0.6%	0.7%
Built 2010 to 2019	1.4%±1.6 pts	5.5%	4.9%	5.0%
Built 1939 or earlier	7.7%±4.7 pts	18.0%	8.4%	20.2%
Households with no vehicle	0.7%±0.9 pts	3.5%	4.6%	11.0%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov

How do people in Census Tract 8646.01 get to work?

50.6% of Census Tract 8646.01's workers drive alone and 33.5% work from home. The average trip to work takes 34.6 minutes.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Tract 8646.01	Lake Forest	Lake County	Illinois
In the labor force (age 16+)	56.8%±5.8 pts	54.1%	68.2%	65.0%
Unemployment rate	3.1%±2.2 pts	1.8%	5.2%	5.8%
Drove alone to work	50.6%±7.9 pts	46.1%	65.7%	65.9%
Carpooled	2.9%±2.4 pts	1.8%	8.5%	7.8%
Public transportation	8.8%±3.6 pts	12.3%	2.7%	5.8%
Walked	0.6%±1.0 pts	5.5%	2.1%	2.8%
Worked from home	33.5%±7.9 pts	30.3%	19.5%	15.9%
Mean travel time to work	34.6 min±4.7	31.3 min	28.5 min	27.8 min

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

How does Census Tract 8646.01 compare with the other tracts in Lake County?

Among Lake County's tracts with a reliable estimate, Census Tract 8646.01 ranks as shown below (1 = highest).

Census Tract 8646.01's rank among the tracts of Lake County and of Lake Forest
Measure	In Lake County	In Lake Forest
Population	103rd of 159	5th of 6
Residents per square mile	140th of 159	5th of 6
Median household income	1st of 155	1st of 6
Per capita income	5th of 159	3rd of 6
Median home value	1st of 154	1st of 6
Median gross rent	81st of 138	4th of 4
Bachelor's degree or higher	13th of 154	3rd of 6
Median age	13th of 159	3rd of 6
Owner-occupied share	28th of 155	2nd of 6

The tracts next to it on Lake County's income ladder

Median household income, ACS 2020-2024 5-year estimates
Tract	Rank	Median household income	Residents
Tract 8646.01	1st	$250,000 or more	3,627
Tract 8646.02	1st	$250,000 or more	3,772
Tract 8657	1st	$250,000 or more	6,204
Tract 8658.02	1st	$250,000 or more	2,977

Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed

How reliable are the figures for Census Tract 8646.01?

2 of the 18 figures for Census Tract 8646.01 on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.

A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections