Census tract · Lake County
Census Tract 8635, Lake County, Illinois
Census Tract 8635, GEOID 17097863500, in Lake County, Illinois, entirely within Lake Forest and Shields Township. 4,435 residents in the ACS 2020-2024 5-year estimates (±513); the 2020 Census counted 4,538.
Residents, 2020-2024
4,435
±513 (90% margin)
2020 Census count: 4,538
Median household income
$197,431
±$51,758 (90% margin)
Lake County: $110,416
Median home value
$768,300
±$145,640 (90% margin)
Lake County: $345,700
Median gross rent
$1,835
±$160 (90% margin)
Lake County: $1,477
Where is Census Tract 8635?
Census Tract 8635 is one of 160 census tracts in Lake County, Illinois. It covers 5.09 square miles of land, 892 residents per square mile in 2020. Its GEOID, 17097863500, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Lake Forest | 100% |
| Shields Township | 100% |
6 census tracts border Census Tract 8635: Tract 8632.02 ($163,190), Tract 8634 ($245,375), Tract 8646.01 ($250,000 or more), Tract 8646.02 ($250,000 or more), Tract 8650 ($242,000) 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 8635?
The 2020-2024 American Community Survey puts Census Tract 8635's population at 4,435 (±513) in 1,985 households; the 2020 Census counted 4,538 residents and 2,262 housing units.
| Measure | Tract 8635 | Lake Forest |
|---|---|---|
| Total population | 4,435 ±513 | 19,416 |
| Households | 1,985 ±243 | 6,900 |
| Average household size | 2.18 ±0.13 | 2.63 |
| Housing units | 2,135 ±265 | 7,282 |
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 8635?
The median resident of Census Tract 8635 is 58.6 years old; 15.7% are under 18 and 42.0% are 65 or older. The largest group is non-Hispanic white residents at 84.3%, then Hispanic or Latino residents (of any race) at 5.1%. 9.2% of residents were born outside the United States.
| Measure | Tract 8635 | Lake Forest |
|---|---|---|
| Median age | 58.6 ±4.9 | 46.1 |
| Under 18 years | 15.7% ±2.5 pts | 19.2% |
| 65 years and over | 42.0% ±5.9 pts | 26.7% |
| Hispanic or Latino (any race) | 5.1% ±4.4 pts | 6.1% |
| White alone, not Hispanic | 84.3% ±8.1 pts | 80.2% |
| Black or African American alone, not Hispanic | 0.2% ±0.3 pts | 1.0% |
| Asian alone, not Hispanic | 3.8% ±4.5 pts | 6.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Two or more races, not Hispanic | 3.3% ±2.7 pts | 5.4% |
| Some other race alone, not Hispanic | 3.3% ±4.7 pts | 0.9% |
| Born outside the United States | 9.2% ±4.3 pts | 10.8% |
| Speak a language other than English at home (age 5+) | 13.5% ±7.0 pts | 13.0% |
| Civilian veterans (age 18+) | 3.9% ±2.0 pts | 2.7% |
| With a disability | 18.6% ±6.1 pts | 12.9% |
| No health insurance coverage | 1.4% ±1.6 pts | 1.8% |
| High school graduate or higher (age 25+) | 97.9% ±2.5 pts | 98.1% |
| Bachelor's degree or higher (age 25+) | 77.0% ±5.2 pts | 80.5% |
| Graduate or professional degree (age 25+) | 40.1% ±6.6 pts | 41.9% |
| Lived in the same house a year earlier | 85.2% ±6.3 pts | 84.4% |
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 8635 earn?
Half of the 1,985 households in Census Tract 8635 earn less than $197,431 a year (±$51,758), against $110,416 across Lake County: 25th highest of the county's 155 tracts with a reliable estimate.
| Measure | Tract 8635 | Lake Forest |
|---|---|---|
| Median household income | $197,431 ±$51,758 | $235,081 |
| Mean household income | $290,704 ±$48,938 | $303,251 |
| Per capita income | $132,270 ±$22,423 | $109,918 |
| People below the poverty line | 2.8% ±2.4 pts | 3.5% |
| Children under 18 below the poverty line | 2.8% ±4.3 pts | 4.0% |
| Households receiving SNAP | 0.0% ±1.9 pts | 1.4% |
| Households with a computer | 95.7% ±3.0 pts | 98.2% |
| Households with a broadband subscription | 89.6% ±5.3 pts | 95.4% |
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 8635?
Owners occupy 81.2% of Census Tract 8635's occupied homes and renters 18.8%. The median owner-occupied home is valued at $768,300 by its owner (±$145,640). The median renter pays $1,835 a month including utilities, and 31.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 8635 | Lake Forest |
|---|---|---|
| Median home value (owner-occupied) | $768,300 ±$145,640 | $938,300 |
| Median gross rent | $1,835 ±$160 | $1,815 |
| Renters paying 35% or more of income on rent | 31.3% ±18.0 pts | 32.9% |
| Median monthly owner costs, with a mortgage | $3,934 ±$990 | $4,000 or more |
| Owner-occupied homes | 81.2% ±6.3 pts | 88.8% |
| Renter-occupied homes | 18.8% ±6.3 pts | 11.2% |
| Housing units | 2,135 ±265 | 7,282 |
| Single-family detached homes | 55.1% ±8.4 pts | 76.6% |
| Mobile homes | 0.0% ±1.7 pts | 0.1% |
| Built 2020 or later | 0.8% ±1.2 pts | 0.7% |
| Built 2010 to 2019 | 3.2% ±3.2 pts | 5.5% |
| Built 1939 or earlier | 24.4% ±7.5 pts | 18.0% |
| Households with no vehicle | 9.9% ±6.7 pts | 3.5% |
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 8635 get to work?
50.9% of Census Tract 8635's workers drive alone and 28.9% work from home. The average trip to work takes 32.0 minutes.
| Measure | Tract 8635 | Lake Forest |
|---|---|---|
| In the labor force (age 16+) | 47.7% ±5.9 pts | 54.1% |
| Unemployment rate | 1.9% ±2.0 pts | 1.8% |
| Drove alone to work | 50.9% ±9.7 pts | 46.1% |
| Carpooled | 1.7% ±2.0 pts | 1.8% |
| Public transportation | 12.5% ±8.8 pts | 12.3% |
| Walked | 1.9% ±2.9 pts | 5.5% |
| Worked from home | 28.9% ±10.5 pts | 30.3% |
| Mean travel time to work | 32.0 min ±7.1 | 31.3 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 8635 compare with the other tracts in Lake County?
Among Lake County's tracts with a reliable estimate, Census Tract 8635 ranks as shown below (1 = highest).
| Measure | In Lake County | In Lake Forest |
|---|---|---|
| Population | 74th of 159 | 2nd of 6 |
| Residents per square mile | 138th of 159 | 4th of 6 |
| Median household income | 25th of 155 | 5th of 6 |
| Per capita income | 3rd of 159 | 2nd of 6 |
| Median home value | 12th of 154 | 6th of 6 |
| Median gross rent | 45th of 138 | 3rd of 4 |
| Bachelor's degree or higher | 23rd of 154 | 5th of 6 |
| Median age | 1st of 159 | 1st of 6 |
| Owner-occupied share | 69th of 155 | 5th of 6 |
The tracts next to it on Lake County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 8616.11 | 22nd | $202,708±$19,740 · within the margin of this tract |
| Tract 8645.12 | 23rd | $200,670±$44,010 · within the margin of this tract |
| Tract 8644.02 | 24th | $198,291±$38,372 · within the margin of this tract |
| Tract 8635 | 25th | $197,431±$51,758 |
| Tract 8649.03 | 26th | $190,223±$28,797 · within the margin of this tract |
| Tract 8643.06 | 27th | $183,068±$33,954 · within the margin of this tract |
| Tract 8611.07 | 28th | $180,390±$20,679 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
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 8635?
4 of the 18 figures for Census Tract 8635 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