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Where 61401 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 61401 into a pocket calculator and turn it upside down: IOhIg — not quite a word, sorry.
- ➕ As a number, 61,401 = 3 × 97 × 211. Its digits add up to 12, a total 940 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110111111011001 - 🏠 Its numerical neighbours: 61379 (Wyanet, IL, 51 mi away) and 61402 (Galesburg, IL, 1 mi away).
- 🔄 Backwards, 61401 becomes 10416, which is not a ZIP code at all.
- 👥 30 other ZIP codes are made of exactly the same digits (01614, 04116, 04611, 06114, 06141, 06411, …). The farthest-flung twin is 04611 in Beals, ME, 1,177 miles away.
- 🧭 Farther north than 66% of all ZIP codes, and farther west than 57%.
- 🎯438 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 61401 and you would come out at 40.95°S, 89.61°E — 1,104 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 07m of daylight. Shortest: 9h 14m.
- 📏 At 122.9 square miles of land, 61401 is bigger than 82% of ZIP codes — room for about 93 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 30,580This ZIP30,580 |
|---|---|
| Households | 13,694This ZIP13,694 |
| Housing units | 15,404This ZIP15,404 |
| Median age | 41.2This ZIP41.2Illinois39.0US 38.9 |
| Median household income | $50,546This ZIP$50,546Illinois$83,390US $80,734 |
| Median home value | $100,600This ZIP$100,600Illinois$263,300US $332,700 |
| Median gross rent | $810This ZIP$810Illinois$1,274US $1,413 |
| Bachelor's degree or higher | 22.1%This ZIP22.1% |
| Mean commute | 16.8 minThis ZIP16.8 min |
| Population density | 248.9 / sq miThis ZIP248.9 / sq mi |
Business and tax activity
| Business establishments | 711This ZIP711 |
|---|---|
| Employees | 12,529This ZIP12,529 |
| Annual payroll | $494,228,000This ZIP$494,228,000 |
| Tax returns filed | 13,570This ZIP13,570 |
| Total adjusted gross income | $786,667,000This ZIP$786,667,000 |
Land area
| Land area | 122.88 sq miThis ZIP122.88 sq mi |
|---|---|
| Water area | 0.48 sq miThis ZIP0.48 sq mi |
Counties 61401 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Knox County | 79.7% |
| Warren County | 20.3% |
Other place names in 61401
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 61401
| ZIP | City | Distance |
|---|---|---|
61402 | Galesburg, IL | 1.1 mi |
61430 | East Galesburg, IL | 3.9 mi |
61439 | Henderson, IL | 6.1 mi |
61488 | Wataga, IL | 6.8 mi |
61423 | Cameron, IL | 7.3 mi |
61448 | Knoxville, IL | 7.5 mi |
61435 | Gerlaw, IL | 10.1 mi |
61436 | Gilson, IL | 10.4 mi |
61410 | Abingdon, IL | 10.6 mi |
61472 | Rio, IL | 10.9 mi |
Find every ZIP code within 10 miles of 61401 →
Questions about this ZIP code
Where is ZIP code 61401?
61401 is in Galesburg, Illinois, in Knox County, part of the Galesburg, IL micropolitan area. Its published point location is 40.9452, -90.3866.
What county is 61401 in?
61401 spans 2 counties: Knox County and Warren County. Most of it falls in Knox 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 61401?
Galesburg uses area code 309, from NANPA's telephone records.
What time zone is 61401 in?
61401 uses America/Chicago.
How many people live in 61401?
About 30,580 people live in ZIP code 61401, in 13,694 households, at 248.9 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 61401?
$50,546 a year, against $83,390 across Illinois.
What ZIP codes are near 61401?
The closest are 61402 (1.1 mi), 61430 (3.9 mi), 61439 (6.1 mi), 61488 (6.8 mi) and 61423 (7.3 mi).
Is 61401 a PO Box ZIP code?
61401 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “61401 ZIP Code — Galesburg, Illinois (Knox County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61401
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/61401.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.