Illinois Gazetteer > Illinois ZIP Codes > Fairfield, IL ZIP Codes
Fairfield, IL ZIP Codes
IMPORTANT NOTE:
- The US Postal Service (USPS) recognizes just 1 community in Illinois named "Fairfield".
- The USGS Geographic Name Information System (GNIS) recognizes 3 populated places in Illinois named "Fairfield".
- The populated place recognized by the USPS is typically the largest & most prominent community with that name.
Links to ZIP Code profiles with maps.
