Census tract · Mercer County
Census Tract 401, Mercer County, Illinois
Census Tract 401, GEOID 17131040100, in Mercer County, Illinois, partly within Richland Grove Township, Preemption Township, Perryton Township, Sherrard, Matherville, Mercer Township, Cable, Duncan Township, Swedona, Preemption, Hamlet, Reynolds and Greene Township, Mercer County. 4,459 residents in the ACS 2020-2024 5-year estimates (±261); the 2020 Census counted 4,518.
Residents, 2020-2024
4,459
±261 (90% margin)
2020 Census count: 4,518
Median household income
$90,729
±$8,694 (90% margin)
Mercer County: $74,182
Median home value
$197,700
±$19,371 (90% margin)
Mercer County: $146,700
Median gross rent
$839
±$128 (90% margin)
Mercer County: $786
Where is Census Tract 401?
Census Tract 401 is one of 4 census tracts in Mercer County, Illinois. It covers 113.60 square miles of land, 40 residents per square mile in 2020. Its GEOID, 17131040100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Richland Grove Township | 38% |
| Preemption Township | 32% |
| Perryton Township | 19% |
| Sherrard | 13% |
| Matherville | 8% |
| Mercer Township | 6% |
| Cable | 4% |
| Duncan Township | 4% |
| Swedona | 3% |
| Preemption | 3% |
| Hamlet | 1% |
| Reynolds | 1% |
| Greene Township, Mercer County | 1% |
6 census tracts border Census Tract 401: Tract 302.01 in Henry County ($109,819), Tract 402 ($63,696), Tract 403 ($68,625), Tract 404 ($73,538), Tract 241.01 in Rock Island County ($100,750) and Tract 241.03 in Rock Island County ($96,902). 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 401?
The 2020-2024 American Community Survey puts Census Tract 401's population at 4,459 (±261) in 1,783 households; the 2020 Census counted 4,518 residents and 1,958 housing units.
| Measure | Tract 401 | Mercer County |
|---|---|---|
| Total population | 4,459 ±261 | 15,495 |
| Households | 1,783 ±125 | 6,565 |
| Average household size | 2.50 ±0.15 | 2.33 |
| Housing units | 2,022 ±112 | 7,285 |
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 401?
The median resident of Census Tract 401 is 47.6 years old; 19.4% are under 18 and 22.6% are 65 or older. The largest group is non-Hispanic white residents at 94.2%, then Hispanic or Latino residents (of any race) at 3.6%.
| Measure | Tract 401 | Mercer County |
|---|---|---|
| Median age | 47.6 ±3.4 | 44.7 |
| Under 18 years | 19.4% ±2.5 pts | 20.8% |
| 65 years and over | 22.6% ±2.5 pts | 21.9% |
| Hispanic or Latino (any race) | 3.6% ±1.4 pts | 3.4% |
| White alone, not Hispanic | 94.2% ±1.8 pts | 93.1% |
| Black or African American alone, not Hispanic | 0.5% ±0.7 pts | 0.6% |
| Asian alone, not Hispanic | 0.0% ±0.8 pts | 0.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.3% ±0.3 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Two or more races, not Hispanic | 1.5% ±0.8 pts | 2.4% |
| Some other race alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Born outside the United States | 1.1% ±0.8 pts | 1.1% |
| Speak a language other than English at home (age 5+) | 2.4% ±1.4 pts | 2.8% |
| Civilian veterans (age 18+) | 9.5% ±2.1 pts | 8.4% |
| With a disability | 10.0% ±2.1 pts | 13.0% |
| No health insurance coverage | 4.7% ±3.7 pts | 4.6% |
| High school graduate or higher (age 25+) | 93.0% ±3.2 pts | 93.9% |
| Bachelor's degree or higher (age 25+) | 23.9% ±5.0 pts | 20.9% |
| Graduate or professional degree (age 25+) | 8.9% ±3.5 pts | 7.1% |
| Lived in the same house a year earlier | 96.3% ±1.9 pts | 93.3% |
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 401 earn?
Half of the 1,783 households in Census Tract 401 earn less than $90,729 a year (±$8,694), against $74,182 across Mercer County: 1st highest of the county's 4 tracts with a reliable estimate. 8.6% of residents live below the poverty line.
| Measure | Tract 401 | Mercer County |
|---|---|---|
| Median household income | $90,729 ±$8,694 | $74,182 |
| Mean household income | $106,717 ±$9,761 | $92,846 |
| Per capita income | $43,280 ±$3,861 | $39,391 |
| People below the poverty line | 8.6% ±3.7 pts | 8.9% |
| Children under 18 below the poverty line | 12.7% ±6.0 pts | 12.2% |
| Households receiving SNAP | 3.9% ±1.8 pts | 9.9% |
| Households with a computer | 92.0% ±5.5 pts | 92.9% |
| Households with a broadband subscription | 90.2% ±5.3 pts | 90.5% |
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 401?
Owners occupy 91.6% of Census Tract 401's occupied homes and renters 8.4%. The median owner-occupied home is valued at $197,700 by its owner (±$19,371). The median renter pays $839 a month including utilities.
| Measure | Tract 401 | Mercer County |
|---|---|---|
| Median home value (owner-occupied) | $197,700 ±$19,371 | $146,700 |
| Median gross rent | $839 ±$128 | $786 |
| Renters paying 35% or more of income on rent | 29.1% ±21.1 pts | 26.0% |
| Median monthly owner costs, with a mortgage | $1,372 ±$60 | $1,327 |
| Owner-occupied homes | 91.6% ±3.2 pts | 83.8% |
| Renter-occupied homes | 8.4% ±3.2 pts | 16.2% |
| Housing units | 2,022 ±112 | 7,285 |
| Single-family detached homes | 94.6% ±2.4 pts | 87.9% |
| Mobile homes | 0.5% ±0.6 pts | 2.9% |
| Built 2020 or later | 0.5% ±0.8 pts | 0.2% |
| Built 2010 to 2019 | 4.8% ±2.8 pts | 3.0% |
| Built 1939 or earlier | 20.5% ±4.0 pts | 30.6% |
| Households with no vehicle | 5.2% ±3.1 pts | 2.8% |
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 401 get to work?
83.6% of Census Tract 401's workers drive alone and 9.1% work from home. The average trip to work takes 30.1 minutes.
| Measure | Tract 401 | Mercer County |
|---|---|---|
| In the labor force (age 16+) | 58.8% ±5.1 pts | 60.8% |
| Unemployment rate | 1.6% ±1.2 pts | 3.2% |
| Drove alone to work | 83.6% ±4.7 pts | 79.1% |
| Carpooled | 6.6% ±2.7 pts | 8.0% |
| Public transportation | 0.0% ±1.7 pts | 0.0% |
| Walked | 0.7% ±0.8 pts | 2.4% |
| Worked from home | 9.1% ±3.6 pts | 10.1% |
| Mean travel time to work | 30.1 min ±3.6 | 28.1 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 401 compare with the other tracts in Mercer County?
Among Mercer County's tracts with a reliable estimate, Census Tract 401 ranks as shown below (1 = highest).
| Measure | In Mercer County |
|---|---|
| Population | 1st of 4 |
| Residents per square mile | 2nd of 4 |
| Median household income | 1st of 4 |
| Per capita income | 1st of 4 |
| Median home value | 1st of 4 |
| Median gross rent | 1st of 4 |
| Poverty rate | 3rd of 4 |
| Bachelor's degree or higher | 2nd of 4 |
| Median age | 1st of 4 |
| Owner-occupied share | 1st of 4 |
The tracts next to it on Mercer County's income ladder
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 401?
2 of the 18 figures for Census Tract 401 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