ZIP code · Franklin Grove · Illinois · United States
ZIP code 61031 — Franklin Grove
ZIP code 61031 serves Franklin Grove, Illinois.
- Postal code
- 61031Single source Value from one source, not cross-checked.
- City
- Franklin Grove
- County
- Lee
- State
- Illinois
- Country
- United States
- Coordinates
- 41.8580, -89.3171 — precision precise (locality)
View on OpenStreetMap - Population
- 1,615 (ZCTA, ACS 5-year)
- Median household income
- $74,050
- Median age
- 44.1
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · census-acs5. Data generated on 2026-08-21. Methodology · Report an error on this page