Census tract · LaSalle County
Census Tract 9631, LaSalle County, Illinois
Census Tract 9631, GEOID 17099963100, in LaSalle County, Illinois, entirely within Peru Township. 3,450 residents in the ACS 2020-2024 5-year estimates (±320); the 2020 Census counted 3,226.
Residents, 2020-2024
3,450
±320 (90% margin)
2020 Census count: 3,226
Median household income
$84,988
±$6,603 (90% margin)
LaSalle County: $73,045
Median home value
$160,500
±$20,430 (90% margin)
LaSalle County: $161,900
Median gross rent
$929
±$157 (90% margin)
LaSalle County: $928
Where is Census Tract 9631?
Census Tract 9631 is one of 28 census tracts in LaSalle County, Illinois. It covers 4.68 square miles of land, 689 residents per square mile in 2020. Its GEOID, 17099963100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Peru Township | 100% |
| Peru | 90% |
| Dalzell | 1% |
4 census tracts border Census Tract 9631: Tract 9651 in Bureau County ($73,786), Tract 9621 ($63,889), Tract 9630 ($59,949) and Tract 9632 ($66,513). 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 9631?
The 2020-2024 American Community Survey puts Census Tract 9631's population at 3,450 (±320) in 1,489 households; the 2020 Census counted 3,226 residents and 1,486 housing units.
| Measure | Tract 9631 | Peru Township |
|---|---|---|
| Total population | 3,450 ±320 | 10,070 |
| Households | 1,489 ±150 | 4,590 |
| Average household size | 2.32 ±0.16 | 2.13 |
| Housing units | 1,613 ±149 | 4,963 |
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 9631?
The median resident of Census Tract 9631 is 47.6 years old; 17.0% are under 18 and 20.1% are 65 or older. The largest group is non-Hispanic white residents at 85.9%, then Hispanic or Latino residents (of any race) at 11.7%.
| Measure | Tract 9631 | Peru Township |
|---|---|---|
| Median age | 47.6 ±4.3 | 46.7 |
| Under 18 years | 17.0% ±3.1 pts | 19.0% |
| 65 years and over | 20.1% ±4.5 pts | 25.3% |
| Hispanic or Latino (any race) | 11.7% ±6.3 pts | 10.6% |
| White alone, not Hispanic | 85.9% ±6.4 pts | 86.4% |
| Black or African American alone, not Hispanic | 0.0% ±1.1 pts | 0.5% |
| Asian alone, not Hispanic | 0.8% ±1.2 pts | 0.7% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.1 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.1 pts | 0.0% |
| Two or more races, not Hispanic | 1.7% ±1.7 pts | 1.5% |
| Some other race alone, not Hispanic | 0.0% ±1.1 pts | 0.4% |
| Born outside the United States | 4.1% ±4.0 pts | 5.2% |
| Speak a language other than English at home (age 5+) | 7.5% ±5.4 pts | 7.4% |
| Civilian veterans (age 18+) | 9.8% ±3.8 pts | 6.0% |
| With a disability | 13.4% ±4.0 pts | 17.6% |
| No health insurance coverage | 2.0% ±1.5 pts | 2.6% |
| High school graduate or higher (age 25+) | 94.7% ±3.9 pts | 94.7% |
| Bachelor's degree or higher (age 25+) | 18.9% ±4.3 pts | 23.2% |
| Graduate or professional degree (age 25+) | 6.8% ±3.2 pts | 8.6% |
| Lived in the same house a year earlier | 96.3% ±2.4 pts | 91.6% |
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 9631 earn?
Half of the 1,489 households in Census Tract 9631 earn less than $84,988 a year (±$6,603), against $73,045 across LaSalle County: 5th highest of the county's 28 tracts with a reliable estimate. 3.8% of residents live below the poverty line.
| Measure | Tract 9631 | Peru Township |
|---|---|---|
| Median household income | $84,988 ±$6,603 | $75,417 |
| Mean household income | $109,441 ±$14,637 | $90,822 |
| Per capita income | $47,367 ±$6,954 | $42,110 |
| People below the poverty line | 3.8% ±1.8 pts | 9.0% |
| Children under 18 below the poverty line | 2.1% ±3.0 pts | 10.7% |
| Households receiving SNAP | 4.2% ±3.3 pts | 8.1% |
| Households with a computer | 93.2% ±3.5 pts | 87.9% |
| Households with a broadband subscription | 90.5% ±5.5 pts | 83.5% |
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 9631?
Owners occupy 86.4% of Census Tract 9631's occupied homes and renters 13.6%. The median owner-occupied home is valued at $160,500 by its owner (±$20,430). The median renter pays $929 a month including utilities.
| Measure | Tract 9631 | Peru Township |
|---|---|---|
| Median home value (owner-occupied) | $160,500 ±$20,430 | $156,800 |
| Median gross rent | $929 ±$157 | $921 |
| Renters paying 35% or more of income on rent | 5.3% ±8.2 pts | 23.2% |
| Median monthly owner costs, with a mortgage | $1,310 ±$167 | $1,269 |
| Owner-occupied homes | 86.4% ±5.8 pts | 75.6% |
| Renter-occupied homes | 13.6% ±5.8 pts | 24.4% |
| Housing units | 1,613 ±149 | 4,963 |
| Single-family detached homes | 95.7% ±2.7 pts | 85.0% |
| Mobile homes | 0.0% ±2.3 pts | 0.7% |
| Built 2020 or later | 0.0% ±2.3 pts | 0.3% |
| Built 2010 to 2019 | 0.6% ±0.9 pts | 0.7% |
| Built 1939 or earlier | 30.4% ±7.3 pts | 27.4% |
| Households with no vehicle | 1.9% ±1.7 pts | 8.4% |
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 9631 get to work?
75.2% of Census Tract 9631's workers drive alone and 7.8% work from home. The average trip to work takes 21.1 minutes.
| Measure | Tract 9631 | Peru Township |
|---|---|---|
| In the labor force (age 16+) | 68.9% ±6.0 pts | 61.8% |
| Unemployment rate | 2.3% ±1.9 pts | 2.4% |
| Drove alone to work | 75.2% ±7.4 pts | 79.3% |
| Carpooled | 12.5% ±5.1 pts | 11.0% |
| Public transportation | 0.0% ±1.9 pts | 0.7% |
| Walked | 2.9% ±4.2 pts | 1.6% |
| Worked from home | 7.8% ±3.8 pts | 5.3% |
| Mean travel time to work | 21.1 min ±6.7 | 18.6 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 9631 compare with the other tracts in LaSalle County?
Among LaSalle County's tracts with a reliable estimate, Census Tract 9631 ranks as shown below (1 = highest).
| Measure | In LaSalle County |
|---|---|
| Population | 17th of 28 |
| Residents per square mile | 11th of 28 |
| Median household income | 5th of 28 |
| Per capita income | 4th of 28 |
| Median home value | 16th of 28 |
| Median gross rent | 18th of 26 |
| Poverty rate | 26th of 27 |
| Bachelor's degree or higher | 16th of 26 |
| Median age | 5th of 28 |
| Owner-occupied share | 4th of 28 |
The tracts next to it on LaSalle County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 9617.01 | 2nd | $103,819±$15,153 |
| Tract 9623 | 3rd | $96,159±$8,375 |
| Tract 9640 | 4th | $92,667±$16,349 · within the margin of this tract |
| Tract 9631 | 5th | $84,988±$6,603 |
| Tract 9635 | 6th | $84,113±$8,120 · within the margin of this tract |
| Tract 9617.02 | 7th | $82,153±$16,953 · within the margin of this tract |
| Tract 9636 | 8th | $81,181±$9,926 · 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 9631?
2 of the 18 figures for Census Tract 9631 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