Williamsville is a village in Sangamon County, Illinois, home to about 1,314 people across 1.6 square miles. Its ZIP code is 62693.
Homes sold for a median of $137 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Williamsville. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Williamsville’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | St. Louis Lambert International Airport (STL)94 miles away |
|---|---|
| Closer regional airport | Abraham Lincoln Capital Airport (SPI)10 miles away |
| Nearest city of 250,000+ | St. Louis, MO98 miles away |
| Nearest city of 1 million+ | Chicago, IL162 miles away |
Straight-line distances from the center of Williamsville; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Williamsville had 1,425 residents in the 2020 census, down 1% since 2000.
It’s the 622nd largest of 1,450 towns in Illinois by population.
Sangamon County grew from 71,593 residents in 1900 to 196,343 in 2020.
Sangamon County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 20°F. About 38.2 inches of rain and melted snow fall in a typical year, with about 22 inches of snow.
Source: NOAA 1991–2020 climate normals, Springfield Capital Ap, IL weather station (10 miles away).
80,005 jobs at 4,925 businesses in Sangamon County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Williamsville.
Nearest hospitals
Providers with an office here
| Mental health providers | 1 |
|---|
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (1 nearby)
Grocery stores (1 nearby)
Libraries (1 nearby)
Museums (2 nearby)
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Williamsville CUSD 15. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Williamsville Jr High SchoolWilliamsville | 5–8 | 444 | Public | 0.3 mi |
| Williamsville High SchoolWilliamsville | 9–12 | 462 | Public | 0.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.