Census tract · DeKalb County
Census Tract 4.01, DeKalb County, Illinois
Census Tract 4.01, GEOID 17037000401, in DeKalb County, Illinois, mostly within Sycamore Township (74% of its census blocks). 4,491 residents in the ACS 2020-2024 5-year estimates (±653); the 2020 Census counted 3,975.
Residents, 2020-2024
4,491
±653 (90% margin)
2020 Census count: 3,975
Median household income
$101,287
±$20,495 (90% margin)
DeKalb County: $70,724
Median home value
$325,700
±$47,247 (90% margin)
DeKalb County: $243,600
Median gross rent
$1,180
±$46 (90% margin)
DeKalb County: $1,049
Where is Census Tract 4.01?
Census Tract 4.01 is one of 23 census tracts in DeKalb County, Illinois. It covers 18.94 square miles of land, 210 residents per square mile in 2020. Its GEOID, 17037000401, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Sycamore Township | 74% |
| Sycamore | 57% |
| Cortland Township | 26% |
5 census tracts border Census Tract 4.01: Tract 4.02 ($135,455), Tract 6 ($73,450), Tract 16 ($100,147), Tract 8507.03 in Kane County ($119,559) and Tract 8524.03 in Kane County ($131,731). 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 4.01?
The 2020-2024 American Community Survey puts Census Tract 4.01's population at 4,491 (±653) in 1,761 households; the 2020 Census counted 3,975 residents and 1,666 housing units.
| Measure | Tract 4.01 | Sycamore Township |
|---|---|---|
| Total population | 4,491 ±653 | 14,846 |
| Households | 1,761 ±237 | 5,946 |
| Average household size | 2.54 ±0.36 | 2.48 |
| Housing units | 1,785 ±243 | 6,242 |
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 4.01?
The median resident of Census Tract 4.01 is 41.8 years old; 20.4% are under 18 and 15.5% are 65 or older. The largest group is non-Hispanic white residents at 88.9%, then Hispanic or Latino residents (of any race) at 5.7%. 9.7% of residents were born outside the United States.
| Measure | Tract 4.01 | Sycamore Township |
|---|---|---|
| Median age | 41.8 ±4.8 | 37.6 |
| Under 18 years | 20.4% ±3.1 pts | 24.6% |
| 65 years and over | 15.5% ±5.1 pts | 15.3% |
| Hispanic or Latino (any race) | 5.7% ±4.3 pts | 10.8% |
| White alone, not Hispanic | 88.9% ±6.1 pts | 82.3% |
| Black or African American alone, not Hispanic | 0.6% ±1.0 pts | 1.6% |
| Asian alone, not Hispanic | 3.8% ±4.2 pts | 1.5% |
| 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 | 1.0% ±0.9 pts | 3.7% |
| Some other race alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Born outside the United States | 9.7% ±5.7 pts | 4.1% |
| Speak a language other than English at home (age 5+) | 7.6% ±4.8 pts | 7.1% |
| Civilian veterans (age 18+) | 4.9% ±3.0 pts | 6.9% |
| With a disability | 9.1% ±4.0 pts | 9.8% |
| No health insurance coverage | 3.0% ±2.6 pts | 1.9% |
| High school graduate or higher (age 25+) | 96.4% ±2.3 pts | 96.3% |
| Bachelor's degree or higher (age 25+) | 49.4% ±7.5 pts | 45.6% |
| Graduate or professional degree (age 25+) | 19.1% ±7.5 pts | 18.6% |
| Lived in the same house a year earlier | 87.6% ±4.8 pts | 87.2% |
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 4.01 earn?
Half of the 1,761 households in Census Tract 4.01 earn less than $101,287 a year (±$20,495), against $70,724 across DeKalb County: 3rd highest of the county's 23 tracts with a reliable estimate.
| Measure | Tract 4.01 | Sycamore Township |
|---|---|---|
| Median household income | $101,287 ±$20,495 | $87,400 |
| Mean household income | $118,035 ±$21,352 | $112,381 |
| Per capita income | $47,311 ±$7,408 | $45,995 |
| People below the poverty line | 9.3% ±7.1 pts | 7.5% |
| Children under 18 below the poverty line | 2.0% ±3.2 pts | 6.9% |
| Households receiving SNAP | 4.4% ±2.8 pts | 9.2% |
| Households with a computer | 100.0% ±2.1 pts | 99.1% |
| Households with a broadband subscription | 99.0% ±1.3 pts | 96.5% |
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 4.01?
Owners occupy 74.8% of Census Tract 4.01's occupied homes and renters 25.2%. The median owner-occupied home is valued at $325,700 by its owner (±$47,247). The median renter pays $1,180 a month including utilities.
| Measure | Tract 4.01 | Sycamore Township |
|---|---|---|
| Median home value (owner-occupied) | $325,700 ±$47,247 | $287,700 |
| Median gross rent | $1,180 ±$46 | $1,183 |
| Renters paying 35% or more of income on rent | 16.5% ±12.2 pts | 25.4% |
| Median monthly owner costs, with a mortgage | $2,200 ±$308 | $2,124 |
| Owner-occupied homes | 74.8% ±5.9 pts | 70.3% |
| Renter-occupied homes | 25.2% ±5.9 pts | 29.7% |
| Housing units | 1,785 ±243 | 6,242 |
| Single-family detached homes | 46.9% ±8.3 pts | 60.1% |
| Mobile homes | 0.0% ±2.1 pts | 0.0% |
| Built 2020 or later | 2.7% ±3.0 pts | 1.2% |
| Built 2010 to 2019 | 4.3% ±2.9 pts | 6.7% |
| Built 1939 or earlier | 4.8% ±3.3 pts | 16.9% |
| Households with no vehicle | 4.9% ±3.3 pts | 4.1% |
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 4.01 get to work?
73.6% of Census Tract 4.01's workers drive alone and 10.6% work from home. The average trip to work takes 31.0 minutes.
| Measure | Tract 4.01 | Sycamore Township |
|---|---|---|
| In the labor force (age 16+) | 71.4% ±7.8 pts | 67.4% |
| Unemployment rate | 2.4% ±2.0 pts | 3.3% |
| Drove alone to work | 73.6% ±6.1 pts | 74.6% |
| Carpooled | 8.2% ±4.3 pts | 5.2% |
| Public transportation | 0.6% ±1.0 pts | 0.8% |
| Walked | 0.0% ±1.5 pts | 2.0% |
| Worked from home | 10.6% ±4.3 pts | 14.7% |
| Mean travel time to work | 31.0 min ±4.7 | 27.7 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 4.01 compare with the other tracts in DeKalb County?
Among DeKalb County's tracts with a reliable estimate, Census Tract 4.01 ranks as shown below (1 = highest).
| Measure | In DeKalb County |
|---|---|
| Population | 12th of 23 |
| Residents per square mile | 15th of 23 |
| Median household income | 3rd of 23 |
| Per capita income | 3rd of 23 |
| Median home value | 3rd of 20 |
| Median gross rent | 7th of 23 |
| Bachelor's degree or higher | 2nd of 23 |
| Median age | 4th of 23 |
| Owner-occupied share | 10th of 21 |
The tracts next to it on DeKalb County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4.02 | 1st | $135,455±$25,491 |
| Tract 17 | 2nd | $105,057±$14,998 · within the margin of this tract |
| Tract 4.01 | 3rd | $101,287±$20,495 |
| Tract 16 | 4th | $100,147±$16,579 · within the margin of this tract |
| Tract 19 | 5th | $99,844±$14,272 · within the margin of this tract |
| Tract 18 | 6th | $96,250±$14,933 · 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 4.01?
4 of the 18 figures for Census Tract 4.01 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