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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/61340

61340

ZIP 61340 is Mark, Illinois, in Putnam County; area codes 779 and 815; Central time.

Type
Standard
Time zone
America/Chicago
County
Putnam
Metro area
Ottawa, IL
Population
545
Coordinates
41.2640, -89.2513
☼ Live from 61340 — Mark, IL

Weather right now

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Local time: —

Where 61340 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 61340
  • 🔢 Type 61340 into a pocket calculator and turn it upside down: OhEIg — not quite a word, sorry.
  • ➕ As a number, 61,340 = 2 × 2 × 5 × 3067. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110111110011100
  • 🏠 Its numerical neighbours: 61338 (Manlius, IL, 26 mi away) and 61341 (Marseilles, IL, 30 mi away).
  • 🔄 Backwards, 61340 becomes 04316, which is not a ZIP code at all.
  • 👥 68 other ZIP codes are made of exactly the same digits (01346, 01364, 01436, 01463, 03461, 04613, …). The farthest-flung twin is 34061 in FPO AA, a military post office, 2,310 miles away.
  • 🧭 Farther north than 69% of all ZIP codes, and farther west than 54%.
  • 🎯499 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 61340 and you would come out at 41.26°S, 90.75°E — 1,138 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 09m of daylight. Shortest: 9h 12m.
  • 📏 At 0.872 square miles of land, 61340 is bigger than 7% of ZIP codes — about 422 football fields.
🌙 The sky over 61340 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population545This ZIP545
Households260This ZIP260
Housing units292This ZIP292
Median age44.4This ZIP44.4Illinois39.0US 38.9
Median household income$78,750This ZIP$78,750Illinois$83,390US $80,734
Median home value$160,100This ZIP$160,100Illinois$263,300US $332,700
Median gross rent$938This ZIP$938Illinois$1,274US $1,413
Bachelor's degree or higher21.0%This ZIP21.0%
Mean commute19.2 minThis ZIP19.2 min
Population density625.0 / sq miThis ZIP625.0 / sq mi

Business and tax activity

Business establishments10This ZIP10
Employees234This ZIP234
Annual payroll$13,138,000This ZIP$13,138,000

Land area

Land area0.87 sq miThis ZIP0.87 sq mi
Water area0.00 sq mi

Other place names in 61340

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

ZIP codes near 61340

ZIPCityDistance
61326 Granville, IL 1.7 mi
61327 Hennepin, IL 3.4 mi
61363 Standard, IL 3.6 mi
61322 Depue, IL 4.4 mi
61315 Bureau, IL 6.2 mi
61362 Spring Valley, IL 6.2 mi
61316 Cedar Point, IL 6.4 mi
61359 Seatonville, IL 6.9 mi
61335 Mc Nabb, IL 7.3 mi
61354 Peru, IL 7.5 mi

Find every ZIP code within 10 miles of 61340 →

Questions about this ZIP code

Where is ZIP code 61340?

61340 is in Mark, Illinois, in Putnam County, part of the Ottawa, IL micropolitan area. Its published point location is 41.2640, -89.2513.

What county is 61340 in?

61340 lies in Putnam County.

What area code is 61340?

Mark uses area codes 779 and 815, from NANPA's telephone records.

What time zone is 61340 in?

61340 uses America/Chicago.

How many people live in 61340?

About 545 people live in ZIP code 61340, in 260 households, at 625.0 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 61340?

$78,750 a year, against $83,390 across Illinois.

What ZIP codes are near 61340?

The closest are 61326 (1.7 mi), 61327 (3.4 mi), 61363 (3.6 mi), 61322 (4.4 mi) and 61315 (6.2 mi).

Is 61340 a PO Box ZIP code?

61340 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “61340 ZIP Code — Mark, Illinois (Putnam County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61340

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