Chillicothe is a city in Peoria County, Illinois, home to about 5,900 people across 5.3 square miles. Its ZIP code is 61523.
Homes sold for a median of $125 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 Chillicothe. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Chillicothe’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)110 miles away |
|---|---|
| Closer regional airport | General Wayne A. Downing Peoria International Airport (PIA)19 miles away |
| Nearest city of 250,000+ | Chicago, IL114 miles away |
Straight-line distances from the center of Chillicothe; 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.
Chillicothe had 6,128 residents in the 2020 census, up 2% since 2000.
It’s the 306th largest of 1,450 towns in Illinois by population.
Peoria County grew from 88,608 residents in 1900 to 181,830 in 2020.
Peoria 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 18°F. About 38.6 inches of rain and melted snow fall in a typical year, with about 25 inches of snow.
Source: NOAA 1991–2020 climate normals, Lacon, IL weather station (9 miles away).
103,153 jobs at 4,168 businesses in Peoria County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
34 doctors and other health care providers list an office in Chillicothe.
Nearest hospitals
Providers with an office here
| Primary care doctors | 5 |
|---|---|
| Dentists | 5 |
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 6 |
| Physical and occupational therapists | 10 |
| Optometrists | 1 |
| Chiropractors | 2 |
| Pharmacies | 3 |
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 (4 nearby)
Grocery stores (1 nearby)
Pharmacies (1 nearby)
Libraries (1 nearby)
Museums (3 nearby)
Counts are within about 1.5 miles 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 Il Valley Central USD 321. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| South Elementary SchoolChillicothe | Pre-K–3 | 424 | Public | 1.0 mi |
| Chillicothe Elementary CenterChillicothe | 4–5 | 156 | Public | 1.5 mi |
| Chillicothe Jr HighChillicothe | 6–8 | 229 | Public | 1.5 mi |
| Il Valley Central High SchoolChillicothe | 9–12 | 650 | Public | 0.8 mi |
| IVC Learning CenterChillicothe | 9–12 | — | Alternative Education | 1.6 mi |
| IVC Transition CenterChillicothe | 9–12 | — | Alternative Education | 1.5 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Calvary Baptist AcademyChillicothe | Pre-K–12 | 30 | Baptist | 0.7 mi |
| St Edward SchoolChillicothe | Pre-K–8 | 69 | Roman Catholic | 1.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Rome.
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.