Town Chart.

← Look up another ZIP code · All towns in Illinois

ZIP code 61103

Rockford, IL · Winnebago County

About ZIP code 61103

  • ZIP code 61103 is in Rockford, Winnebago County, Illinois.
  • About 22,869 people live in it, which is 540.5 people per square mile.
  • Time zone: Central Standard Time.
  • The middle of the ZIP code is at 42.345, -89.083.

A ZIP code is a mail delivery area, not a town border, and one ZIP code can cover parts of several towns. To check a single address, use the US Postal Service lookup.

Rockford, IL

ZIP code 61103 is the post office name for Rockford, IL. 147,521 people live in Rockford. Typical household income is $54,752. A typical home costs $129,000.

  • Stronger than most towns on: Diversity & community, Walkability and Short commute.
  • Weaker than most towns on: Property taxes, Schools and Clean air and low disaster risk.

See all figures for Rockford

Other ZIP codes in Rockford

Nearby ZIP codes

ZIP code list from SimpleMaps US Zips. Population is a US Census Bureau estimate. These are estimates, so check official sources before you decide.