Census tract · Stephenson County
Census Tract 1, Stephenson County, Illinois
Census Tract 1, GEOID 17177000100, in Stephenson County, Illinois, mostly within Rock Run Township (55% of its census blocks). 4,636 residents in the ACS 2020-2024 5-year estimates (±369); the 2020 Census counted 4,500.
Residents, 2020-2024
4,636
±369 (90% margin)
2020 Census count: 4,500
Median household income
$86,178
±$4,437 (90% margin)
Stephenson County: $64,043
Median home value
$201,300
±$29,340 (90% margin)
Stephenson County: $134,900
Median gross rent
$681
±$316 (90% margin)
Stephenson County: $798
Where is Census Tract 1?
Census Tract 1 is one of 13 census tracts in Stephenson County, Illinois. It covers 96.45 square miles of land, 47 residents per square mile in 2020. Its GEOID, 17177000100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Rock Run Township | 55% |
| Rock Grove Township | 27% |
| Dakota Township | 18% |
| Davis | 14% |
| Lake Summerset | 10% |
| Dakota | 8% |
| Rock City | 4% |
| Lancaster Township | 0% |
| Oneco Township | 0% |
4 census tracts border Census Tract 1: Tract 2 ($75,642), Tract 6 ($91,583), Tract 41 in Winnebago County ($86,365) and Tract 43 in Winnebago County ($82,396). 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 1?
The 2020-2024 American Community Survey puts Census Tract 1's population at 4,636 (±369) in 1,821 households; the 2020 Census counted 4,500 residents and 2,079 housing units.
| Measure | Tract 1 | Rock Run Township |
|---|---|---|
| Total population | 4,636 ±369 | 2,162 |
| Households | 1,821 ±123 | 885 |
| Average household size | 2.55 ±0.17 | 2.44 |
| Housing units | 1,980 ±106 | 994 |
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 1?
The median resident of Census Tract 1 is 47.0 years old; 22.6% are under 18 and 25.5% are 65 or older. The largest group is non-Hispanic white residents at 90.1%, then Hispanic or Latino residents (of any race) at 4.8%.
| Measure | Tract 1 | Rock Run Township |
|---|---|---|
| Median age | 47.0 ±2.9 | 50.6 |
| Under 18 years | 22.6% ±3.3 pts | 17.6% |
| 65 years and over | 25.5% ±2.5 pts | 23.7% |
| Hispanic or Latino (any race) | 4.8% ±3.6 pts | 7.7% |
| White alone, not Hispanic | 90.1% ±3.9 pts | 88.2% |
| Black or African American alone, not Hispanic | 0.5% ±0.8 pts | 0.0% |
| Asian alone, not Hispanic | 0.5% ±0.4 pts | 0.0% |
| 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 | 4.1% ±1.8 pts | 4.1% |
| Some other race alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Born outside the United States | 3.1% ±2.1 pts | 4.1% |
| Speak a language other than English at home (age 5+) | 3.5% ±2.2 pts | 4.8% |
| Civilian veterans (age 18+) | 6.7% ±1.4 pts | 5.4% |
| With a disability | 12.4% ±2.3 pts | 12.4% |
| No health insurance coverage | 3.3% ±1.6 pts | 3.1% |
| High school graduate or higher (age 25+) | 94.8% ±2.1 pts | 95.2% |
| Bachelor's degree or higher (age 25+) | 26.2% ±5.8 pts | 26.6% |
| Graduate or professional degree (age 25+) | 11.5% ±3.0 pts | 11.4% |
| Lived in the same house a year earlier | 86.0% ±4.4 pts | 91.8% |
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 1 earn?
Half of the 1,821 households in Census Tract 1 earn less than $86,178 a year (±$4,437), against $64,043 across Stephenson County: 3rd highest of the county's 13 tracts with a reliable estimate. 6.0% of residents live below the poverty line.
| Measure | Tract 1 | Rock Run Township |
|---|---|---|
| Median household income | $86,178 ±$4,437 | $90,083 |
| Mean household income | $110,493 ±$10,904 | $116,425 |
| Per capita income | $43,707 ±$3,939 | $48,210 |
| People below the poverty line | 6.0% ±2.1 pts | 2.9% |
| Children under 18 below the poverty line | 9.0% ±5.0 pts | 0.0% |
| Households receiving SNAP | 6.5% ±2.6 pts | 6.6% |
| Households with a computer | 95.2% ±2.3 pts | 94.6% |
| Households with a broadband subscription | 86.7% ±4.4 pts | 86.2% |
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 1?
Owners occupy 86.8% of Census Tract 1's occupied homes and renters 13.2%. The median owner-occupied home is valued at $201,300 by its owner (±$29,340). The median renter pays $681 a month including utilities, and 24.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 1 | Rock Run Township |
|---|---|---|
| Median home value (owner-occupied) | $201,300 ±$29,340 | $164,800 |
| Median gross rent | $681 ±$316 | $838 |
| Renters paying 35% or more of income on rent | 24.3% ±14.0 pts | 20.4% |
| Median monthly owner costs, with a mortgage | $1,589 ±$164 | $1,577 |
| Owner-occupied homes | 86.8% ±3.9 pts | 86.6% |
| Renter-occupied homes | 13.2% ±3.9 pts | 13.4% |
| Housing units | 1,980 ±106 | 994 |
| Single-family detached homes | 92.9% ±2.9 pts | 92.8% |
| Mobile homes | 1.7% ±1.3 pts | 3.1% |
| Built 2020 or later | 0.0% ±1.9 pts | 0.0% |
| Built 2010 to 2019 | 2.5% ±1.5 pts | 2.5% |
| Built 1939 or earlier | 34.0% ±6.2 pts | 45.2% |
| Households with no vehicle | 4.3% ±2.2 pts | 2.3% |
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 1 get to work?
80.1% of Census Tract 1's workers drive alone and 12.4% work from home. The average trip to work takes 31.3 minutes. The unemployment rate in 2020-2024 averaged 4.2%.
| Measure | Tract 1 | Rock Run Township |
|---|---|---|
| In the labor force (age 16+) | 59.0% ±4.0 pts | 64.2% |
| Unemployment rate | 4.2% ±2.1 pts | 3.4% |
| Drove alone to work | 80.1% ±5.1 pts | 76.1% |
| Carpooled | 4.3% ±2.4 pts | 3.2% |
| Public transportation | 1.2% ±1.3 pts | 0.0% |
| Walked | 1.4% ±1.5 pts | 2.5% |
| Worked from home | 12.4% ±4.8 pts | 17.3% |
| Mean travel time to work | 31.3 min ±2.9 | 29.9 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 1 compare with the other tracts in Stephenson County?
Among Stephenson County's tracts with a reliable estimate, Census Tract 1 ranks as shown below (1 = highest).
| Measure | In Stephenson County |
|---|---|
| Population | 1st of 13 |
| Residents per square mile | 10th of 13 |
| Median household income | 3rd of 13 |
| Per capita income | 2nd of 13 |
| Median home value | 1st of 13 |
| Median gross rent | 10th of 11 |
| Poverty rate | 11th of 13 |
| Bachelor's degree or higher | 2nd of 12 |
| Median age | 6th of 13 |
| Owner-occupied share | 4th of 13 |
The tracts next to it on Stephenson County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 5 | 1st | $95,870±$11,319 · within the margin of this tract |
| Tract 6 | 2nd | $91,583±$9,615 · within the margin of this tract |
| Tract 1 | 3rd | $86,178±$4,437 |
| Tract 3 | 4th | $79,053±$11,386 · within the margin of this tract |
| Tract 2 | 5th | $75,642±$5,115 |
| Tract 4 | 6th | $69,762±$19,461 · 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 1?
3 of the 18 figures for Census Tract 1 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