Zip Code 61103
Rockford, Illinois — Winnebago County
📍 ZIP code 61103 is in Rockford, Winnebago County, Illinois.
ZIP code 61103 is located in Rockford, Winnebago County, Illinois. It is a zip code in the Central (CST/CDT) Time Zone with an estimated population of 23,238. The area code for ZIP code 61103 is 309.
Quick Answer
Zip code 61103 is in Rockford, Illinois (Winnebago County). It has a population of 23,238, median household income of $47,390, and median home value of $114,800.
Population
23,238
Income
$47,390
Home Value
$114,800
Climate
84°F / 15°F
About Zip Code 61103
Zip code 61103 is located in Rockford, Illinois, within Winnebago County. Home to approximately 23,238 residents, this area sits at an elevation of 768 ft and falls within the Central (CST/CDT) timezone. The local area code is 309.
The median household income is $47,390 per year, which is below the national median of $70,784. Homes in this zip code have a median value of $114,800, and the cost of living index is 60 (40% below the national average of 100).
Summers average a high of 84°F while winters drop to 15°F. The area receives about 37 in of rain and 37 in of snow annually. The zip code covers 17.2 square miles of land area and 0.6 square miles of water.
Key Statistics
23,238
$47,390
$114,800
Central (CST/CDT)
309
768 ft
17.2 sq mi
40.2
11,271
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Compare With Nearby Zip Codes
| Metric | 61103 | 61101 | 61115 | 61111 | 61114 | 61107 |
|---|---|---|---|---|---|---|
| City | Rockford, IL | Rockford, IL | Loves Park, IL | Loves Park, IL | Rockford, IL | Rockford, IL |
| Population | 23,238 | 19,671 | 22,424 | 22,838 | 15,026 | 29,473 |
| Median Income | $47,390 | $45,260 | $73,771 | $58,391 | $83,472 | $75,492 |
| Home Value | $114,800 | $89,800 | $160,700 | $143,700 | $196,000 | $165,200 |
| Cost of Living | 60 | 60 | 70 | 60 | 83 | 71 |
| Median Age | 40.2 | 38.1 | 40.1 | 36.7 | 46.8 | 43.2 |
Cost of Living
100 = National Average. Rockford's cost of living is 40% below the national average.
vs. State Avg
Below
Affordability
Very Affordable
Income-to-Home
2.4x
Demographics
Zip code 61103 has a population of 23,238 people with a median age of 40.2. There are 11,271 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Rockford (61103) population trend from 2010 to 2024
↓ -9.6%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
84°F
15°F
37 in
37 in
Rockford experiences warm summers with average highs around 84°F. Winters are cold with lows averaging 15°F. With 37 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$114,800
Median Household Income
$47,390
With 11,271 housing units across 17.2 square miles, 61103 has a housing density of 655 units per square mile. The home price-to-income ratio is 2.4x.
Location & Geography
Latitude
42.3402°
Longitude
-89.0866°
Land Area
17.2 sq mi
Water Area
0.6 sq mi
Nearby Zip Codes
Zip codes closest to 61103 (Rockford, IL) with distances:
All Zip Codes in Rockford, IL
Other zip codes serving Rockford:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 61103's $47,390. A way to compare Rockford to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 61103 (Rockford, IL). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Rockford, Illinois?
Rockford, Illinois uses zip code 61103 along with 4 other zip codes.
What county is zip code 61103 in?
Zip code 61103 is located in Winnebago County, Illinois.
What is the population of zip code 61103?
The population of zip code 61103 is 23,238 with a median age of 40.2.
Is 61103 in Rockford, Illinois?
Yes, zip code 61103 is in Rockford, Winnebago County, Illinois. The area code is 309.
Frequently Asked Questions
What city is zip code 61103 in?
Zip code 61103 is in Rockford, Illinois. It is part of Winnebago County and uses the Central (CST/CDT) timezone.
What is zip code 61103?
Zip code 61103 is a U.S. postal code in Rockford, Illinois (Winnebago County). It has a population of 23,238 and covers 17.2 square miles.
What is the population of zip code 61103?
The population of zip code 61103 (Rockford, IL) is 23,238 with a median age of 40.2. There are approximately 11,271 housing units in this area.
What is the median income in zip code 61103?
The median household income in zip code 61103 (Rockford, IL) is $47,390 per year. The cost of living index is 60 (100 = national average).
What is the average home price in zip code 61103?
The median home value in zip code 61103 (Rockford, IL) is $114,800. The cost of living index is 60 compared to the national average of 100.
What county is zip code 61103 in?
Zip code 61103 is located in Winnebago County, Illinois. The primary city is Rockford.
What is the area code for zip code 61103?
Zip code 61103 in Rockford, IL uses area code 309. It is located in the Central (CST/CDT) timezone.
Is zip code 61103 a good place to live?
Zip code 61103 (Rockford, IL) has a cost of living index of 60 (100 = national average), a median household income of $47,390, and median home values of $114,800. The median age is 40.2. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 61103?
The cost of living index for zip code 61103 (Rockford, IL) is 60, where 100 represents the national average. This area is below the national average. Median home value: $114,800.
What schools serve zip code 61103?
Zip code 61103 in Rockford, Illinois is served by the local school district of Winnebago County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.