Marseilles is a city in LaSalle County, Illinois, home to about 4,279 people across 9.1 square miles. Its ZIP code is 61341.
Homes sold for a median of $138 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 Marseilles. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Marseilles’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)58 miles away |
|---|---|
| Nearest city of 250,000+ | Chicago, IL63 miles away |
Straight-line distances from the center of Marseilles; 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.
Marseilles had 4,845 residents in the 2020 census, up 4% since 2000.
It’s the 365th largest of 1,450 towns in Illinois by population.
LaSalle County grew from 87,776 residents in 1900 to 109,658 in 2020.
LaSalle County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 14°F. About 39.1 inches of rain and melted snow fall in a typical year, with about 25 inches of snow.
Source: NOAA 1991–2020 climate normals, Marseilles Lock, IL weather station (3 miles away).
33,721 jobs at 2,523 businesses in LaSalle County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
17 doctors and other health care providers list an office in Marseilles.
Nearest hospitals
Providers with an office here
| Primary care doctors | 4 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 1 |
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 4 |
| Physical and occupational therapists | 5 |
| 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.
Libraries (1 nearby)
Counts are within about 2 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.
Established in 1835.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Marseilles ESD 150, Miller Twp CCSD 210. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Marseilles Elementary SchoolMarseilles | Pre-K–8 | 528 | Public | 0.4 mi |
| Milton Pope Elem SchoolMarseilles | K–8 | 195 | Public | 5.6 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.