United States › Illinois › Buffalo CITY · 2020 ACS
Buffalo Illinois · 447 residents · 0.35 sq mi
Time machine
COMPARE TO 1990 Census 2000 Census 2009 ACS 2010 ACS 2011 ACS 2012 ACS 2013 ACS 2014 ACS 2015 ACS 2016 ACS 2017 ACS 2018 ACS 2019 ACS 2021 ACS 2022 ACS 2023 ACS 2024 ACS
The short version
With 447 people, Buffalo is a city in Illinois. The typical home is worth $89,700. Owners hold 74% of the housing stock. That trails the Illinois median by roughly 23%. About 28% of adults have finished a four-year degree. 8% of people here were born outside the United States.
At a glance
Lower income
below the US median
US median: $66,278
Mid-age
median age 39.5
US median: 38.8
Less educated
28% hold a bachelor's degree
US average: 33%
More affordable
home values down 12%, inflation adjusted
US median home: $265,253
Section 01
Population & growth from 36.4 in 2000
US average: 38.8
Population, 1990 – 2024
340 400 460 520 580 1990 2000 2010 2020 2024 Buffalo Age distribution, 2020
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Section 02
Income & economy $52,750
−3%inflation adjusted, since 2000
from $36,250 in 2000
US average: $66,278
from $19,637 in 2000
US average: $35,364
Households earning $100K+
from 25.4% in 2009
US average: 43.9%
from 10.8% in 2000
US average: 12.8%
Workforce by industry, 2020
Professional, scientific, technical 4.4%
Transportation & warehousing 3.3%
Education & health services 2.7%
Agriculture, forestry, fishing 1.6%
Public administration 1.6%
Arts, entertainment, food 0%
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$89,700
−12%inflation adjusted, since 2000
from $67,500 in 2000
US average: $265,253
$905
+129%inflation adjusted, since 2000
from $263 in 2000
US average: $1,124
from 74.4% in 2000
25.7% rent
from 2.33 people in 2009
US average: 2.61
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.
Section 04
Race & ethnicity 2000
White, non-Hispanic 96.3%(473)
2020
White, non-Hispanic 93.3%(417)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 2 more ancestry groups with data from 12.2% in 2000
US average: 32.9%
High school or higher
from 85.9% in 2000
US average: 88.5%
from 5.0% in 2000
US average: 12.7%
Section 06
Commute & transportation from 17.1 min in 2000
US average: 26.9
from 90.1% in 2009
US average: 75.1%
from 11.8% in 2009
US average: 8.4%
Section 07
Work & employment from 3.1% in 2011
US average: 5.4%
from 58.9% in 2011
US average: 63.4%
Women 20-64 in the labor force
US average: 73.3%
from 21.1% in 2009
US average: 39.3%
Section 08
People & community from 0.0% in 2009
US average: 13.5%
from 6.8% in 2013
US average: 8.8%
Computer in household
US average: 91.9%
Marital status (2024)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 6.8% in 2013
US average: 8.8%
Direct-purchase
US average: 13.7%
VA health care
US average: 2.3%
Any private
US average: 68.1%
Any public
US average: 35.2%
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, 2020
Gulf War (2001 or later) 28.6%(8)
Gulf War (1990s) 35.7%(10)
Share of the 28 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.
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Drill deeper
Places similar to Buffalo Head to head
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Frequently asked
How many people live in Buffalo, Illinois? Buffalo, Illinois has about 447 residents according to the 2020 American Community Survey.
What is the median household income in Buffalo, Illinois? The typical household in Buffalo, Illinois earns about $52,750 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 $89,700, and the typical rent is about $905 a month.
How educated are people in Buffalo, Illinois? About 27.8% 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 11.0% 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 74 residents, a change of about -14 percent over that period.
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