Delavan is a city in Tazewell County, Illinois, home to about 1,489 people across 1.4 square miles. Its ZIP code is 61734.
Homes sold for a median of $100 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 Delavan. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Delavan’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Chicago Midway International Airport (MDW)135 miles away |
|---|---|
| Closer regional airport | General Wayne A. Downing Peoria International Airport (PIA)22 miles away |
| Nearest city of 250,000+ | Chicago, IL140 miles away |
Straight-line distances from the center of Delavan; 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.
Delavan had 1,568 residents in the 2020 census, down 14% since 2000.
It’s the 588th largest of 1,450 towns in Illinois by population.
Tazewell County grew from 33,221 residents in 1900 to 131,343 in 2020.
Tazewell County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 16°F. About 39.3 inches of rain and melted snow fall in a typical year, with about 13 inches of snow.
Source: NOAA 1991–2020 climate normals, Mason City 4se, IL weather station (15 miles away).
43,738 jobs at 2,772 businesses in Tazewell County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
3 doctors and other health care providers list an office in Delavan.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Mental health providers | 1 |
| Pharmacies | 2 |
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 (3 nearby)
Libraries (1 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 Delavan CUSD 703. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Delavan Elementary SchoolDelavan | Pre-K–6 | 191 | Public | 0.9 mi |
| Delavan Jr High SchoolDelavan | 7–8 | 55 | Public | 0.9 mi |
| Delavan High SchoolDelavan | 9–12 | 129 | Public | 0.9 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.