United States › Illinois › Buffalo CITY
Buffalo Illinois · 437 residents (2025 est.) · 0.35 sq mi
Time machine
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The short version
With 482 people, Buffalo is a city in Illinois. The median age is 45.9, about 7 years above the US median. The typical home is worth $112,100, having risen by half since 2000. Renters pay $533 a month at the median. That trails the Illinois median by roughly 33%. About 26% of adults have finished a four-year degree.
At a glance
Lower income
below the US median
US median: $82,259
Older
median age 45.9
US median: 38.9
Less educated
26% hold a bachelor's degree
US average: 36%
More affordable
home values down 9%, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 491 in 2000
437 in 2025 (Census Bureau estimate)
1,397 / sq mi
+22%since 2009
from 1,142 / sq mi in 2009
US average: 281
from 36.4 in 2000
US average: 38.9
Population, 1990 – 2024
340 400 460 520 580 1990 2000 2010 2020 2024 Buffalo Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $56,250
−15%inflation adjusted, since 2000
from $36,250 in 2000
US average: $82,259
from $19,637 in 2000
US average: $44,673
Households earning $100K+
from 25.4% in 2009
US average: 53.3%
from 10.8% in 2000
US average: 12.5%
from 0.418 in 2010
US average: 0.476
Workforce by industry, 2024
Professional, scientific, technical 6.5%
Education & health services 2.5%
Transportation & warehousing 2%
Agriculture, forestry, fishing 1%
Arts, entertainment, food 0.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
$112,100
−9%inflation adjusted, since 2000
from $67,500 in 2000
US average: $376,019
$533
+11%inflation adjusted, since 2000
from $263 in 2000
US average: $1,442
from 74.4% in 2000
30.5% rent
from 9.1% in 2009
US average: 10.0%
from 2.33 people in 2009
US average: 2.54
from 18.9% in 2009
US average: 22.9%
from 32.8% in 2009
US average: 47.4%
from 2.4 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 96.3%(473)
2024
White, non-Hispanic 87.1%(420)
from 12 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 2 more ancestry groups with data from 12.2% in 2000
US average: 35.6%
High school or higher
from 85.9% in 2000
US average: 89.6%
from 5.0% in 2000
US average: 14.0%
Section 06
Commute & transportation from 17.1 min in 2000
US average: 26.5
from 90.1% in 2009
US average: 68.9%
from 5.7% in 2009
US average: 8.5%
from 0.0% in 2009
US average: 3.2%
from 0.0% in 2009
US average: 15.0%
from 0.0% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 11.8% in 2009
US average: 8.3%
Section 07
Work & employment from 3.1% in 2011
US average: 5.2%
from 58.9% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 78.4% in 2020
US average: 74.6%
from 10.3% in 2009
US average: 13.1%
from 21.1% in 2009
US average: 42.5%
Section 08
People & community from 0.0% in 2009
US average: 14.1%
from 17.0% in 2009
US average: 6.2%
from 20.7% in 2012
US average: 13.3%
from 6.8% in 2013
US average: 8.4%
from 65.0% in 2017
US average: 91.0%
Computer in household
from 89.5% in 2020
US average: 95.5%
from 89.0% in 2020
US average: 87.7%
from 97.6% in 2016
US average: 77.7%
from 1.5% in 2016
US average: 13.6%
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 6.8% in 2013
US average: 8.4%
from 63.5% in 2020
US average: 54.8%
Direct-purchase
from 13.0% in 2020
US average: 13.8%
from 22.0% in 2020
US average: 18.4%
from 27.2% in 2020
US average: 20.9%
VA health care
from 3.5% in 2020
US average: 2.2%
Any private
from 70.4% in 2020
US average: 67.1%
Any public
from 47.0% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 22.6%(7)
Share of the 31 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper
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Frequently asked
How many people live in Buffalo, Illinois? Buffalo, Illinois has about 482 residents according to the 2024 American Community Survey.
What is the median household income in Buffalo, Illinois? The typical household in Buffalo, Illinois earns about $56,250 a year. Half of households make more than that, and half make less.
Is Buffalo, Illinois expensive? In Buffalo, Illinois, the median home is worth about $112,100, and the typical rent is about $533 a month.
How educated are people in Buffalo, Illinois? About 25.6% of adults age 25 and over in Buffalo, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Buffalo, Illinois? About 16.6% of people in Buffalo, Illinois live below the federal poverty line.
Has Buffalo, Illinois grown since 1990? Yes, Buffalo, Illinois has shrunk since 1990. The population has lost about 39 residents, a change of about -7 percent over that period.
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