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zipcodes.pro — ZIP/61436

61436

ZIP 61436 is Gilson, Illinois, in Knox County; area code 309; Central time.

Type
Standard
Time zone
America/Chicago
County
Knox
Metro area
Galesburg, IL
Population
745
Coordinates
40.8601, -90.2232
☼ Live from 61436 — Gilson, IL

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Local time: —

Where 61436 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.

★ Weird and wonderful facts about 61436
  • 🔢 Type 61436 into a pocket calculator and turn it upside down: gEhIg — not quite a word, sorry.
  • ➕ As a number, 61,436 = 2 × 2 × 15359. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110111111111100
  • 🏠 Its numerical neighbours: 61435 (Gerlaw, IL, 20 mi away) and 61437 (Gladstone, IL, 40 mi away).
  • 🔄 Backwards, 61436 becomes 63416, which is not a ZIP code at all.
  • 👥 29 other ZIP codes are made of exactly the same digits (13646, 13664, 16346, 16364, 16436, 16634, …). The farthest-flung twin is 34661 in Nobleton, FL, 958 miles away.
  • 🧭 Farther north than 65% of all ZIP codes, and farther west than 57%.
  • 🎯446 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 61436 and you would come out at 40.86°S, 89.78°E — 1,115 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 61.2 square miles of land, 61436 is bigger than 65% of ZIP codes — room for about 46 Central Parks.
🌙 The sky over 61436 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population745This ZIP745
Households332This ZIP332
Housing units390This ZIP390
Median age59.5This ZIP59.5Illinois39.0US 38.9
Median household income$76,000This ZIP$76,000Illinois$83,390US $80,734
Median home value$205,000This ZIP$205,000Illinois$263,300US $332,700
Bachelor's degree or higher19.5%This ZIP19.5%
Mean commute33.4 minThis ZIP33.4 min
Population density12.2 / sq miThis ZIP12.2 / sq mi

Business and tax activity

Business establishments5This ZIP5
Employees4This ZIP4
Annual payroll$406,000This ZIP$406,000
Tax returns filed380This ZIP380
Total adjusted gross income$29,554,000This ZIP$29,554,000

Land area

Land area61.18 sq miThis ZIP61.18 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 61436

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 61436

ZIPCityDistance
61448 Knoxville, IL 5.2 mi
61458 Maquon, IL 5.8 mi
61430 East Galesburg, IL 7.4 mi
61428 Dahinda, IL 7.6 mi
61401 Galesburg, IL 10.4 mi
61572 Yates City, IL 10.5 mi
61544 London Mills, IL 11.0 mi
61402 Galesburg, IL 11.0 mi
61489 Williamsfield, IL 11.1 mi
61410 Abingdon, IL 11.4 mi

Find every ZIP code within 10 miles of 61436 →

Questions about this ZIP code

Where is ZIP code 61436?

61436 is in Gilson, Illinois, in Knox County, part of the Galesburg, IL micropolitan area. Its published point location is 40.8601, -90.2232.

What county is 61436 in?

61436 lies in Knox County.

What area code is 61436?

Gilson uses area code 309, from NANPA's telephone records.

What time zone is 61436 in?

61436 uses America/Chicago.

How many people live in 61436?

About 745 people live in ZIP code 61436, in 332 households, at 12.2 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 61436?

$76,000 a year, against $83,390 across Illinois.

What ZIP codes are near 61436?

The closest are 61448 (5.2 mi), 61458 (5.8 mi), 61430 (7.4 mi), 61428 (7.6 mi) and 61401 (10.4 mi).

Is 61436 a PO Box ZIP code?

61436 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “61436 ZIP Code — Gilson, Illinois (Knox County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61436

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