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Where 61102 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 61102 into a pocket calculator and turn it upside down: ZOIIg — not quite a word, sorry.
- ➕ As a number, 61,102 = 2 × 137 × 223. Its digits add up to 10, a total 513 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110111010101110 - 🏠 Its numerical neighbours: 61101 (Rockford, IL, 8 mi away) and 61103 (Rockford, IL, 9 mi away).
- 🔄 Backwards, 61102 becomes 20116 — and that is a real ZIP code: Marshall, VA, 637 miles away.
- 👥 32 other ZIP codes are made of exactly the same digits (01612, 02116, 06112, 10126, 10162, 10261, …). The farthest-flung twin is 02116 in Boston, MA, 923 miles away.
- 🧭 Farther north than 77% of all ZIP codes, and farther west than 54%.
- 🎯518 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 61102 and you would come out at 42.23°S, 90.84°E — 1,104 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 34.1 square miles of land, 61102 is bigger than 49% of ZIP codes — room for about 26 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 15,937This ZIP15,937 |
|---|---|
| Households | 6,047This ZIP6,047 |
| Housing units | 7,064This ZIP7,064 |
| Median age | 38.3This ZIP38.3Illinois39.0US 38.9 |
| Median household income | $46,599This ZIP$46,599Illinois$83,390US $80,734 |
| Median home value | $98,900This ZIP$98,900Illinois$263,300US $332,700 |
| Median gross rent | $883This ZIP$883Illinois$1,274US $1,413 |
| Bachelor's degree or higher | 10.2%This ZIP10.2% |
| Mean commute | 22.7 minThis ZIP22.7 min |
| Population density | 467.2 / sq miThis ZIP467.2 / sq mi |
Business and tax activity
| Business establishments | 197This ZIP197 |
|---|---|
| Employees | 4,087This ZIP4,087 |
| Annual payroll | $209,299,000This ZIP$209,299,000 |
| Tax returns filed | 7,340This ZIP7,340 |
| Total adjusted gross income | $345,588,000This ZIP$345,588,000 |
Land area
| Land area | 34.11 sq miThis ZIP34.11 sq mi |
|---|---|
| Water area | 0.88 sq miThis ZIP0.88 sq mi |
Counties 61102 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 | 88.2% |
| Ogle County | 11.8% |
Other place names in 61102
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 61102
| ZIP | City | Distance |
|---|---|---|
61104 | Rockford, IL | 4.5 mi |
61105 | Rockford, IL | 4.6 mi |
61088 | Winnebago, IL | 5.8 mi |
61109 | Rockford, IL | 6.0 mi |
61106 | Rockford, IL | 6.7 mi |
61110 | Rockford, IL | 6.7 mi |
61125 | Rockford, IL | 6.7 mi |
61126 | Rockford, IL | 6.7 mi |
61130 | Loves Park, IL | 6.7 mi |
61131 | Loves Park, IL | 6.7 mi |
Find every ZIP code within 10 miles of 61102 →
Questions about this ZIP code
Where is ZIP code 61102?
61102 is in Rockford, Illinois, in Winnebago County, part of the Rockford, IL metropolitan area. Its published point location is 42.2288, -89.1625.
What county is 61102 in?
61102 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 61102?
Rockford uses area codes 815 and 779, from NANPA's telephone records.
What time zone is 61102 in?
61102 uses America/Chicago.
How many people live in 61102?
About 15,937 people live in ZIP code 61102, in 6,047 households, at 467.2 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 61102?
$46,599 a year, against $83,390 across Illinois.
What ZIP codes are near 61102?
The closest are 61104 (4.5 mi), 61105 (4.6 mi), 61088 (5.8 mi), 61109 (6 mi) and 61106 (6.7 mi).
Is 61102 a PO Box ZIP code?
61102 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “61102 ZIP Code — Rockford, Illinois (Winnebago County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61102
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/61102.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.