County · Illinois · United States
LaSalle County ZIP codes
24 ZIP codes · 24 cities · FIPS 17099
Key facts
- State
- Illinois (IL)
- FIPS code
- 17099
- Population
- 109,049
- Median household income
- $72,281
- Median age
- 42.1
- Land area
- 1,135.2 sq mi (2,940.1 km²)
- Population density
- 96 / sq mi
- Area codes
- 779, 815
Cities and ZIP codes in LaSalle County (24)
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.