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🇺🇸 United States ZIP Code

STANDARD

61102

Rockford

ZIP Code 61102 is a standard zip code serving Rockford, Rockford, Illinois (IL), in Winnebago County, United States. It has an estimated population of 20,538 with a median household income of $32,441. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

$0 National: $37,585 $150K+ $32,441

Location

Country
🇺🇸 United States
State / Province
Illinois (IL)
County
Winnebago
City
Rockford
Timezone
America/Chicago

Coordinates

Latitude
42.254700
Longitude
-89.124700

Geographic Details

Land Area
34.43 mi²
Water Area
1.09 mi²
Population Density
597.0 people per mi² (70th percentile)
Bounding Box
42.291232°N, 42.154359°S, -89.091710°E, -89.240981°W

With 20,538 residents spread across 34.43 square miles, this area has a population density of 597.0 people per square mile.

Demographics

20,538

Population

80th percentile

$32,441

Median Income

10th percentile

$80,400

Median Home Value

20th percentile

34.43 mi²

Land Area

The median household income in 61102 is $32,441, and the median home value is $80,400. This is below the national average for household income.

Housing

7,474

Total Units

6,591

Occupied Units

88.2%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Rockford, IL.

61101

Rockford

 61103

Rockford

 61104

Rockford

 61105

Rockford

 61106

Rockford

 61107

Rockford

 61108

Rockford

 61109

Rockford

 61110

Rockford

 61112

Rockford

Similar ZIP Codes in Illinois

ZIP codes with similar median household income in Illinois.

60064

North Chicago

$35,293

 60608

Chicago

$35,336

 60609

Chicago

$33,630

 60612

Chicago

$35,318

 60619

Chicago

$34,977

 60620

Chicago

$31,753

 60623

Chicago

$28,949

 60649

Chicago

$28,573

Frequently Asked Questions

What information is available for each ZIP code?
Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).
What are the different types of ZIP codes?
There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.
How often is ZIP code data updated?
ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.
What is population density and why does it matter?
Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.
How are ZIP code boundaries determined?
ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.
What does median household income tell me about a ZIP code?
Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.