Williamsville, Illinois.
Typical home $261,984 (+5.5% in a year). Springfield, IL metro.
to buy the typical home at today's mortgage rate — +$733 (+114%) since Jan 2020.
- 1 year
- Up $13,774 +6%
- $248,210$261,984 since Sep 2025
- 5 years
- Up $70,094 +37%
- $191,890$261,984 since Sep 2021
Monthly payment to buy the typical home
Home value × that month's 30-year mortgage rate, 20% down, principal and interest. This is the line households feel: prices and rates compound each other.
- Williamsville$1,375
- Illinois$1,553
- United States$1,922
At the last five years' pace, a typical home here doubles in price every 11 years.
Typical home values in Williamsville, IL rose 5.5% over the past year — faster than the nation's +1.2%.
Living in Williamsville, Sangamon County, Illinois
Williamsville is a village of 1,425 people in Sangamon County. Half its households earn more than $106,731 a year and half less, against $75,357 across Sangamon County; 7% of its people live below the poverty line. 88% of its homes are lived in by their owners and 12% are rented. Unemployment in Sangamon County was 3.8% in August 2026, and the county had 2.6% fewer jobs in 2025 than the year before. The most residents work in schools and health care, then finance and property.
Written by AI Claude Sonnet 5.5 wrote this on 23 October 2026 from the figures here, a list of nearby places and what it knows. It can be wrong or out of date.
What it’s like
The place. Williamsville is a small village in Sangamon County, home to a community where most families own the houses they live in. Residents are older than the typical American, and household incomes run well above the county's. Fewer people live below the poverty line here than you might expect, and a four-year degree is common among adults. Winters are cold and snowy, with January the coldest month, while summers turn properly warm, with July the hottest.
Work. Many residents work in schools, hospitals and social care, and others in banks, insurance, property, government and shops. Across Sangamon County, some of the largest workplaces are Springfield Memorial Hospital, St. Johns Hospital and Springfield Schools. A typical commute is a moderate drive, and a good number of people work from home.
Things to do. A short drive brings you to Carpenter Park, a protected natural area, and to the South Fork Sangamon River. The Illinois State Fairgrounds Racetrack is also a short drive away. For a longer outing, the Lincoln Home National Historic Site is a museum a longer drive away, as is Lake Springfield, a reservoir good for a day by the water.
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- 530households
- 45%of adults have a degree
- 7%below the poverty line
- 25 mintypical commute
- 16%work from home
What residents work in
Employed residents by industry, from the Census survey. Sangamon County had 130,936 jobs in 2025, 2.6% fewer than the year before (Bureau of Labor Statistics).
Weather through the year
Coldest in January, with highs near 36° and lows near 20°; warmest in July, with highs near 87° and lows near 66°. About 22 inches of snow and 38 inches of rain and melted snow a year.
Average daily high and low, 1991–2020, at the Springfield Capital Airport weather station, 11 miles away (NOAA).
Largest workplaces in Sangamon County
- Springfield Memorial HospitalGeneral hospital3,185FTE
- St. Johns HospitalGeneral hospital1,892FTE
- Springfield SD 186School district1,500FTE
- State of Illinois, Department of Innovation and TechnologyComputer program or software development, custom1,378
- General office/parole/ATCs/adult edCorrectional institutions1,179
- City of SpringfieldCity and town managers' offices1,038
- State ofState tax commissions1,016
- University of Illinois SpringfieldUniversity or college879
Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 170 workplaces with 20 or more staff, 30,938 people in all across the county; Williamsville has one of its own. Hospitals come from their Medicare cost reports (CMS, 2023), school districts from the Common Core of Data (NCES, 2023–24) and colleges from IPEDS (NCES, 2023–24); FTE marks full-time equivalent staff. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.
Natural hazards
- TornadoesRelatively high
- Cold wavesRelatively high
- DroughtRelatively moderate
- HailRelatively moderate
- Heat wavesRelatively moderate
- Winter weatherRelatively moderate
FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Williamsville’s census tracts, against the rest of the country; all of them together, relatively low. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.
From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on Sangamon County and the Springfield, IL metro.
Williamsville home values
Zillow measures a city over its municipal boundary. Against the state and national figures, mid-tier homes, smoothed and seasonally adjusted.
- Williamsville$261,984
- Illinois$295,943
- United States$366,157
When this market ran hot
Each cell is that month's year-on-year home-value growth. Read left to right, top row is the latest year — the 2021–22 band is the boom.
Market heat, inside the city limits
Homes for sale
Active for-sale inventory. More supply hands power to buyers.
Not enough data to draw this yet.
Zip codes with a Williamsville address
A different geography, not a breakdown. The figure above covers the municipality; these zips cover everywhere the Post Office calls Williamsville — often including townships beyond the city limits. Both come straight from Zillow, and they are not expected to average out.