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Where 61109 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 61109 into a pocket calculator and turn it upside down: GOIIg — not quite a word, sorry.
- ➕ As a number, 61,109 = 53 × 1153. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110111010110101 - 🏠 Its numerical neighbours: 61108 (Rockford, IL, 5 mi away) and 61110 (Rockford, IL, 11 mi away).
- 🔄 Backwards, 61109 becomes 90116, which is not a ZIP code at all.
- 👥 30 other ZIP codes are made of exactly the same digits (01961, 06119, 06911, 10169, 10916, 11096, …). The farthest-flung twin is 96011 in Big Bend, CA, 1,687 miles away.
- 🧭 Farther north than 77% of all ZIP codes, and farther west than 53%.
- 🎯522 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 61109 and you would come out at 42.19°S, 90.94°E — 1,110 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 16m of daylight. Shortest: 9h 05m.
- 📏 At 38.5 square miles of land, 61109 is bigger than 52% of ZIP codes — room for about 29 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 26,768This ZIP26,768 |
|---|---|
| Households | 11,196This ZIP11,196 |
| Housing units | 11,846This ZIP11,846 |
| Median age | 36.5This ZIP36.5Illinois39.0US 38.9 |
| Median household income | $62,973This ZIP$62,973Illinois$83,390US $80,734 |
| Median home value | $139,400This ZIP$139,400Illinois$263,300US $332,700 |
| Median gross rent | $959This ZIP$959Illinois$1,274US $1,413 |
| Bachelor's degree or higher | 18.2%This ZIP18.2% |
| Mean commute | 22.6 minThis ZIP22.6 min |
| Population density | 694.9 / sq miThis ZIP694.9 / sq mi |
Business and tax activity
| Business establishments | 609This ZIP609 |
|---|---|
| Employees | 18,701This ZIP18,701 |
| Annual payroll | $1,094,278,000This ZIP$1,094,278,000 |
| Tax returns filed | 12,610This ZIP12,610 |
| Total adjusted gross income | $669,438,000This ZIP$669,438,000 |
Land area
| Land area | 38.52 sq miThis ZIP38.52 sq mi |
|---|---|
| Water area | 0.48 sq miThis ZIP0.48 sq mi |
Counties 61109 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Winnebago County | 96.7% |
| Ogle County | 3.3% |
Other place names in 61109
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 61109
| ZIP | City | Distance |
|---|---|---|
61104 | Rockford, IL | 4.4 mi |
61108 | Rockford, IL | 5.2 mi |
61112 | Rockford, IL | 5.4 mi |
61016 | Cherry Valley, IL | 5.5 mi |
61105 | Rockford, IL | 5.9 mi |
61020 | Davis Junction, IL | 6.0 mi |
61102 | Rockford, IL | 6.0 mi |
61052 | Monroe Center, IL | 6.2 mi |
61107 | Rockford, IL | 7.1 mi |
61084 | Stillman Valley, IL | 8.3 mi |
Find every ZIP code within 10 miles of 61109 →
Questions about this ZIP code
Where is ZIP code 61109?
61109 is in Rockford, Illinois, in Winnebago County, part of the Rockford, IL metropolitan area. Its published point location is 42.1913, -89.0558.
What county is 61109 in?
61109 spans 2 counties: Winnebago County and Ogle County. Most of it falls in Winnebago County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What area code is 61109?
Rockford uses area codes 815 and 779, from NANPA's telephone records.
What time zone is 61109 in?
61109 uses America/Chicago.
How many people live in 61109?
About 26,768 people live in ZIP code 61109, in 11,196 households, at 694.9 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 61109?
$62,973 a year, against $83,390 across Illinois.
What ZIP codes are near 61109?
The closest are 61104 (4.4 mi), 61108 (5.2 mi), 61112 (5.4 mi), 61016 (5.5 mi) and 61105 (5.9 mi).
Is 61109 a PO Box ZIP code?
61109 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “61109 ZIP Code — Rockford, Illinois (Winnebago County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61109
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/61109.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.