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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/54123

54123

ZIP 54123 is Forest Junction, Wisconsin, in Calumet County; area code 920; Central time.

Type
Standard
Time zone
America/Chicago
County
Calumet
Metro area
Appleton, WI
Population
204
Coordinates
44.2088, -88.1552
☼ Live from 54123 — Forest Junction, WI

Weather right now

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Local time: —

Where 54123 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 54123
  • 🔢 Type 54123 into a pocket calculator and turn it upside down: EZIhS — not quite a word, sorry.
  • ➕ As a number, 54,123 = 3 × 18041. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1101001101101011
  • 🏠 Its numerical neighbours: 54121 (Florence, WI, 115 mi away) and 54124 (Gillett, WI, 49 mi away).
  • 🔄 Backwards, 54123 becomes 32145 — and that is a real ZIP code: Hastings, FL, 1,070 miles away.
  • 👥 66 other ZIP codes are made of exactly the same digits (12345, 12435, 12453, 12534, 12543, 13425, …). The farthest-flung twin is 34251 in Myakka City, FL, 1,209 miles away.
  • 🧭 Farther north than 88% of all ZIP codes, and farther west than 51%.
  • 🎯614 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 54123 and you would come out at 44.21°S, 91.84°E — 1,079 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 31m of daylight. Shortest: 8h 52m.
  • 📏 At 0.733 square miles of land, 54123 is bigger than 7% of ZIP codes — about 355 football fields.
🌙 The sky over 54123 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population204This ZIP204
Households80This ZIP80
Housing units80This ZIP80
Median age48.7This ZIP48.7Wisconsin40.2US 38.9
Median household income$58,750This ZIP$58,750Wisconsin$77,485US $80,734
Bachelor's degree or higher14.1%This ZIP14.1%
Mean commute18.2 minThis ZIP18.2 min
Population density278.3 / sq miThis ZIP278.3 / sq mi

Business and tax activity

Business establishments8This ZIP8
Employees46This ZIP46
Annual payroll$2,271,000This ZIP$2,271,000
Tax returns filed120This ZIP120
Total adjusted gross income$6,357,000This ZIP$6,357,000

Land area

Land area0.73 sq miThis ZIP0.73 sq mi
Water area0.00 sq mi

Other place names in 54123

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

ZIP codes near 54123

ZIPCityDistance
54110 Brillion, WI 4.0 mi
54129 Hilbert, WI 6.2 mi
54169 Sherwood, WI 6.6 mi
54160 Potter, WI 6.8 mi
54126 Greenleaf, WI 8.2 mi
54130 Kaukauna, WI 8.3 mi
54180 Wrightstown, WI 8.5 mi
54113 Combined Locks, WI 8.5 mi
54952 Menasha, WI 9.1 mi
54140 Little Chute, WI 9.5 mi

Find every ZIP code within 10 miles of 54123 →

Questions about this ZIP code

Where is ZIP code 54123?

54123 is in Forest Junction, Wisconsin, in Calumet County, part of the Appleton, WI metropolitan area. Its published point location is 44.2088, -88.1552.

What county is 54123 in?

54123 lies in Calumet County.

What area code is 54123?

Forest Junction uses area code 920, from NANPA's telephone records.

What time zone is 54123 in?

54123 uses America/Chicago.

How many people live in 54123?

About 204 people live in ZIP code 54123, in 80 households, at 278.3 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 54123?

$58,750 a year, against $77,485 across Wisconsin.

What ZIP codes are near 54123?

The closest are 54110 (4 mi), 54129 (6.2 mi), 54169 (6.6 mi), 54160 (6.8 mi) and 54126 (8.2 mi).

Is 54123 a PO Box ZIP code?

54123 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “54123 ZIP Code — Forest Junction, Wisconsin (Calumet County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/54123

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