United States › Illinois › Williamsville CITY
Williamsville Illinois · 1,437 residents (2025 est.) · 1.55 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 2020 ACS 2021 ACS 2022 ACS 2023 ACS
The short version
Williamsville is home to 1,314 people in Illinois. 88% of homes are owner-occupied. That puts it in the top 6% of US cities for household income. At a median age of 43.4, this is an older place than the country as a whole. The foreign-born share is 3%. 45% of adults hold a bachelor's degree or higher.
At a glance
Wealthier
above the US median
US median: $82,259
Older
median age 43.4
US median: 38.9
More educated
45% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 1,439 in 2000
1,437 in 2025 (Census Bureau estimate)
849 / sq mi
−13%since 2009
from 971 / sq mi in 2009
US average: 281
from 35.8 in 2000
US average: 38.9
Population, 1990 – 2024
1K 1K 1K 2K 2K 1990 2000 2010 2020 2024 Williamsville Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $106,731
+17%inflation adjusted, since 2000
from $50,238 in 2000
US average: $82,259
from $20,201 in 2000
US average: $44,673
Households earning $100K+
from 43.3% in 2009
US average: 53.3%
from 3.1% in 2000
US average: 12.5%
from 0.365 in 2010
US average: 0.476
Workforce by industry, 2024
Public administration 12.5%
Arts, entertainment, food 3%
Professional, scientific, technical 2.8%
Transportation & warehousing 1.6%
Education & health services 0.7%
Agriculture, forestry, fishing 0.4%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
$199,300
+8%inflation adjusted, since 2000
from $101,700 in 2000
US average: $376,019
$943
+2%inflation adjusted, since 2000
from $507 in 2000
US average: $1,442
from 82.1% in 2000
11.9% rent
from 1.7% in 2009
US average: 10.0%
from 2.64 people in 2009
US average: 2.54
from 16.4% in 2009
US average: 22.9%
from 28.8% in 2009
US average: 47.4%
from 2.0 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 97.4%(1,402)
Hispanic / Latino 0.8%(12)
2024
White, non-Hispanic 86.8%(1,140)
Hispanic / Latino 2.1%(28)
from 3 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
+ 9 more ancestry groups with data from 23.6% in 2000
US average: 35.6%
High school or higher
from 87.8% in 2000
US average: 89.6%
from 5.3% in 2000
US average: 14.0%
Section 06
Commute & transportation from 13.0 min in 2000
US average: 26.5
from 88.7% in 2009
US average: 68.9%
from 8.2% in 2009
US average: 8.5%
from 0.5% in 2009
US average: 3.2%
from 1.5% in 2009
US average: 15.0%
from 1.1% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 1.8% in 2009
US average: 8.3%
Section 07
Work & employment from 4.7% in 2011
US average: 5.2%
from 71.9% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 88.3% in 2020
US average: 74.6%
from 22.3% in 2009
US average: 13.1%
from 38.4% in 2009
US average: 42.5%
Section 08
People & community from 1.3% in 2009
US average: 14.1%
from 9.7% in 2009
US average: 6.2%
from 8.7% in 2012
US average: 13.3%
from 2.9% in 2013
US average: 8.4%
from 87.1% in 2017
US average: 91.0%
Computer in household
from 94.0% in 2020
US average: 95.5%
from 92.8% in 2020
US average: 87.7%
from 98.4% in 2016
US average: 77.7%
from 1.4% in 2016
US average: 13.6%
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 2.9% in 2013
US average: 8.4%
from 78.5% in 2020
US average: 54.8%
Direct-purchase
from 10.9% in 2020
US average: 13.8%
from 15.4% in 2020
US average: 18.4%
from 9.2% in 2020
US average: 20.9%
VA health care
from 1.5% in 2020
US average: 2.2%
Any private
from 86.6% in 2020
US average: 67.1%
Any public
from 24.2% 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) 22.9%(16)
Gulf War (1990s) 32.9%(23)
Share of the 70 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 Williamsville, Illinois? Williamsville, Illinois has about 1,314 residents according to the 2024 American Community Survey.
What is the median household income in Williamsville, Illinois? The typical household in Williamsville, Illinois earns about $106,731 a year. Half of households make more than that, and half make less.
Is Williamsville, Illinois expensive? In Williamsville, Illinois, the median home is worth about $199,300, and the typical rent is about $943 a month.
How educated are people in Williamsville, Illinois? About 45.2% of adults age 25 and over in Williamsville, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Williamsville, Illinois? About 6.9% of people in Williamsville, Illinois live below the federal poverty line.
Has Williamsville, Illinois grown since 1990? Yes, Williamsville, Illinois has grown since 1990. The population has added about 174 residents, a change of about 15 percent over that period.
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