Auburn is a city in Sangamon County, Illinois, home to about 4,306 people across 4.1 square miles. Its ZIP code is 62615.
Homes sold for a median of $129 per square foot in the three months ending August 2026, a seller’s market.
Mostly Auburn; also Chatham and Thayer
Each card is that ZIP code’s whole market, including any part outside Auburn. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Auburn’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)67 miles away |
|---|---|
| Closer regional airport | Abraham Lincoln Capital Airport (SPI)18 miles away |
| Nearest city of 250,000+ | St. Louis, MO71 miles away |
| Nearest city of 1 million+ | Chicago, IL189 miles away |
Straight-line distances from the center of Auburn; 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.
Auburn had 4,574 residents in the 2020 census, up 6% since 2000.
It’s the 360th 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 21°F. About 38.4 inches of rain and melted snow fall in a typical year, with about 16 inches of snow.
Source: NOAA 1991–2020 climate normals, Virden, IL weather station (6 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).
9 doctors and other health care providers list an office in Auburn.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 2 |
| Nurse practitioners and physician assistants | 2 |
| Physical and occupational therapists | 2 |
| Chiropractors | 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 (5 nearby)
Libraries (1 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 Auburn CUSD 10. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Auburn Elem SchoolAuburn | Pre-K–2 | 292 | Public | 0.2 mi |
| Auburn Middle SchoolAuburn | 3–5 | 200 | Public | 0.4 mi |
| Auburn High SchoolAuburn | 9–12 | 327 | Public | 0.4 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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Shares ZIP codes with Chatham and Thayer.
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.