Census tract · Lake County
Census Tract 8641.09, Lake County, Illinois
Census Tract 8641.09, GEOID 17097864109, in Lake County, Illinois, entirely within Fremont Township. 5,990 residents in the ACS 2020-2024 5-year estimates (±458); the 2020 Census counted 6,196.
Residents, 2020-2024
5,990
±458 (90% margin)
2020 Census count: 6,196
Median household income
$164,500
±$31,655 (90% margin)
Lake County: $110,416
Median home value
$409,000
±$33,211 (90% margin)
Lake County: $345,700
Median gross rent
not published
Lake County: $1,477
Where is Census Tract 8641.09?
Census Tract 8641.09 is one of 160 census tracts in Lake County, Illinois. It covers 12.35 square miles of land, 502 residents per square mile in 2020. Its GEOID, 17097864109, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Fremont Township | 100% |
| Wauconda | 30% |
| Hawthorn Woods | 25% |
| Round Lake | 7% |
| Round Lake Park | 2% |
| North Barrington | 1% |
8 census tracts border Census Tract 8641.09: Tract 8641.05 ($127,321), Tract 8641.07 ($129,094), Tract 8641.10 ($61,379), Tract 8642.06 ($68,185), Tract 8642.07 ($157,477), Tract 8642.08 ($107,132), Tract 8643.05 ($136,250) and Tract 8644.07 ($207,122). 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 8641.09?
The 2020-2024 American Community Survey puts Census Tract 8641.09's population at 5,990 (±458) in 1,980 households; the 2020 Census counted 6,196 residents and 2,034 housing units.
| Measure | Tract 8641.09 | Fremont Township |
|---|---|---|
| Total population | 5,990 ±458 | 33,607 |
| Households | 1,980 ±226 | 12,630 |
| Average household size | 3.02 ±0.23 | 2.66 |
| Housing units | 2,044 ±221 | 13,041 |
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 8641.09?
The median resident of Census Tract 8641.09 is 42.2 years old; 26.9% are under 18 and 13.9% are 65 or older. The largest group is non-Hispanic white residents at 74.0%, then Hispanic or Latino residents (of any race) at 14.7%. 18.3% of residents were born outside the United States.
| Measure | Tract 8641.09 | Fremont Township |
|---|---|---|
| Median age | 42.2 ±2.0 | 46.5 |
| Under 18 years | 26.9% ±3.5 pts | 21.2% |
| 65 years and over | 13.9% ±6.2 pts | 23.9% |
| Hispanic or Latino (any race) | 14.7% ±3.2 pts | 21.6% |
| White alone, not Hispanic | 74.0% ±6.1 pts | 65.5% |
| Black or African American alone, not Hispanic | 1.1% ±1.5 pts | 1.7% |
| Asian alone, not Hispanic | 7.4% ±4.3 pts | 8.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.6 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.6 pts | 0.0% |
| Two or more races, not Hispanic | 1.4% ±1.7 pts | 2.2% |
| Some other race alone, not Hispanic | 1.4% ±1.7 pts | 0.6% |
| Born outside the United States | 18.3% ±5.3 pts | 19.0% |
| Speak a language other than English at home (age 5+) | 24.9% ±5.7 pts | 29.3% |
| Civilian veterans (age 18+) | 5.7% ±4.6 pts | 5.3% |
| With a disability | 5.4% ±3.6 pts | 12.5% |
| No health insurance coverage | 4.6% ±2.8 pts | 5.1% |
| High school graduate or higher (age 25+) | 97.8% ±1.9 pts | 95.1% |
| Bachelor's degree or higher (age 25+) | 63.8% ±7.5 pts | 51.1% |
| Graduate or professional degree (age 25+) | 16.0% ±5.3 pts | 17.3% |
| Lived in the same house a year earlier | 98.4% ±1.4 pts | 94.4% |
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 8641.09 earn?
Half of the 1,980 households in Census Tract 8641.09 earn less than $164,500 a year (±$31,655), against $110,416 across Lake County: 37th highest of the county's 155 tracts with a reliable estimate.
| Measure | Tract 8641.09 | Fremont Township |
|---|---|---|
| Median household income | $164,500 ±$31,655 | $120,182 |
| Mean household income | $193,558 ±$42,376 | $147,424 |
| Per capita income | $65,335 ±$13,019 | $55,964 |
| People below the poverty line | 1.9% ±1.4 pts | 5.7% |
| Children under 18 below the poverty line | 0.0% ±2.3 pts | 5.5% |
| Households receiving SNAP | 2.7% ±2.8 pts | 5.6% |
| Households with a computer | 99.6% ±0.7 pts | 95.7% |
| Households with a broadband subscription | 100.0% ±1.9 pts | 95.3% |
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 8641.09?
Owners occupy 98.4% of Census Tract 8641.09's occupied homes and renters 1.6%. The median owner-occupied home is valued at $409,000 by its owner (±$33,211).
| Measure | Tract 8641.09 | Fremont Township |
|---|---|---|
| Median home value (owner-occupied) | $409,000 ±$33,211 | $344,600 |
| Renters paying 35% or more of income on rent | 100.0% ±57.2 pts | 57.5% |
| Median monthly owner costs, with a mortgage | $3,259 ±$252 | $2,582 |
| Owner-occupied homes | 98.4% ±2.5 pts | 92.9% |
| Renter-occupied homes | 1.6% ±2.5 pts | 7.1% |
| Housing units | 2,044 ±221 | 13,041 |
| Single-family detached homes | 87.8% ±6.2 pts | 81.3% |
| Mobile homes | 0.0% ±1.8 pts | 5.9% |
| Built 2020 or later | 0.0% ±1.8 pts | 1.0% |
| Built 2010 to 2019 | 6.2% ±3.9 pts | 5.4% |
| Built 1939 or earlier | 0.4% ±0.7 pts | 1.6% |
| Households with no vehicle | 0.4% ±0.8 pts | 3.6% |
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 8641.09 get to work?
61.6% of Census Tract 8641.09's workers drive alone and 15.4% work from home. The average trip to work takes 33.5 minutes. The unemployment rate in 2020-2024 averaged 7.3%.
| Measure | Tract 8641.09 | Fremont Township |
|---|---|---|
| In the labor force (age 16+) | 75.3% ±4.7 pts | 63.0% |
| Unemployment rate | 7.3% ±4.6 pts | 3.2% |
| Drove alone to work | 61.6% ±9.1 pts | 66.2% |
| Carpooled | 11.0% ±7.1 pts | 8.6% |
| Public transportation | 5.3% ±3.0 pts | 2.2% |
| Walked | 0.0% ±1.2 pts | 0.6% |
| Worked from home | 15.4% ±5.8 pts | 20.6% |
| Mean travel time to work | 33.5 min ±3.7 | 30.0 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 8641.09 compare with the other tracts in Lake County?
Among Lake County's tracts with a reliable estimate, Census Tract 8641.09 ranks as shown below (1 = highest).
| Measure | In Lake County |
|---|---|
| Population | 31st of 159 |
| Residents per square mile | 154th of 159 |
| Median household income | 37th of 155 |
| Per capita income | 59th of 159 |
| Median home value | 57th of 154 |
| Bachelor's degree or higher | 56th of 154 |
| Median age | 54th of 159 |
| Owner-occupied share | 6th of 155 |
The tracts next to it on Lake County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 8645.13 | 34th | $170,278±$34,443 · within the margin of this tract |
| Tract 8637.01 | 35th | $168,100±$18,649 · within the margin of this tract |
| Tract 8636.04 | 36th | $166,694±$11,577 · within the margin of this tract |
| Tract 8641.09 | 37th | $164,500±$31,655 |
| Tract 8632.02 | 38th | $163,190±$28,567 · within the margin of this tract |
| Tract 8644.12 | 39th | $162,143±$17,963 · within the margin of this tract |
| Tract 8638.01 | 40th | $161,832±$7,566 · 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 8641.09?
2 of the 17 figures for Census Tract 8641.09 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