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Zip Code 61104 — Rockford, IL

61104 is a ZIP Code associated with Rockford, IL, located within Winnebago. The postal region supports an estimated population of 17,222 residents across Data Pending housing units, with a population density of 1,477.6 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.251860, -89.079110)

Data Metric	Local Statistic
Postal / Zip Code	61104
Primary City	Rockford
State / Province	IL
County	Winnebago
Total Population	17,222
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	1,477.6 people/sq mi
Timezone	America/Chicago

How 61104 Compares

Metric	ZIP 61104	Winnebago County	IL State Average
Population	17,222	285,063	12,694,745
Median Income	Data Pending	N/A	N/A
Population Density	1,477.6 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 61108	Rockford	3.9 mi	30,355	N/A
Zip 61102	Rockford	4.2 mi	15,937	N/A
Zip 61109	Rockford	4.3 mi	26,768	N/A
Zip 61107	Rockford	4.4 mi	30,765	N/A
Zip 61112	Rockford	5.4 mi	152	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →