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Where 61435 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 61435 into a pocket calculator and turn it upside down: SEhIg — not quite a word, sorry.
- ➕ As a number, 61,435 = 5 × 11 × 1117. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110111111111011 - 🏠 Its numerical neighbours: 61434 (Galva, IL, 30 mi away) and 61436 (Gilson, IL, 20 mi away).
- 🔄 Backwards, 61435 becomes 53416, which is not a ZIP code at all.
- 👥 60 other ZIP codes are made of exactly the same digits (13456, 13465, 13645, 13654, 14536, 14563, …). The farthest-flung twin is 31546 in Jesup, GA, 815 miles away.
- 🧭 Farther north than 67% of all ZIP codes, and farther west than 58%.
- 🎯429 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 61435 and you would come out at 41.00°S, 89.43°E — 1,095 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 08m of daylight. Shortest: 9h 13m.
- 📏 At 17.4 square miles of land, 61435 is bigger than 35% of ZIP codes — room for about 13 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 271This ZIP271 |
|---|---|
| Households | 87This ZIP87 |
| Housing units | 98This ZIP98 |
| Median age | 25.8This ZIP25.8Illinois39.0US 38.9 |
| Median gross rent | $708This ZIP$708Illinois$1,274US $1,413 |
| Bachelor's degree or higher | 42.8%This ZIP42.8% |
| Population density | 15.5 / sq miThis ZIP15.5 / sq mi |
Land area
| Land area | 17.45 sq miThis ZIP17.45 sq mi |
|---|---|
| Water area | 0.00 sq mi |
ZIP codes near 61435
| ZIP | City | Distance |
|---|---|---|
61412 | Alexis, IL | 5.7 mi |
61462 | Monmouth, IL | 7.3 mi |
61423 | Cameron, IL | 8.4 mi |
61466 | North Henderson, IL | 9.2 mi |
61402 | Galesburg, IL | 9.3 mi |
61401 | Galesburg, IL | 10.1 mi |
61453 | Little York, IL | 10.2 mi |
61439 | Henderson, IL | 11.6 mi |
61472 | Rio, IL | 12.2 mi |
61488 | Wataga, IL | 13.1 mi |
Find every ZIP code within 10 miles of 61435 →
Questions about this ZIP code
Where is ZIP code 61435?
61435 is in Gerlaw, Illinois, in Warren County. Its published point location is 40.9956, -90.5686.
What county is 61435 in?
61435 lies in Warren County.
What area code is 61435?
Gerlaw uses area code 309, from NANPA's telephone records.
What time zone is 61435 in?
61435 uses America/Chicago.
How many people live in 61435?
About 271 people live in ZIP code 61435, in 87 households, at 15.5 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 61435?
The closest are 61412 (5.7 mi), 61462 (7.3 mi), 61423 (8.4 mi), 61466 (9.2 mi) and 61402 (9.3 mi).
Is 61435 a PO Box ZIP code?
61435 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “61435 ZIP Code — Gerlaw, Illinois (Warren County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61435
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/61435.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.