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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/53551

53551

ZIP 53551 is Lake Mills, Wisconsin, in Jefferson County; area codes 920 and 274; Central time.

Type
Standard
Time zone
America/Chicago
County
Jefferson
Population
9,731
Coordinates
43.0795, -88.9161
☼ Live from 53551 — Lake Mills, WI

Weather right now

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Local time: —

Where 53551 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 53551
  • 🔢 Type 53551 into a pocket calculator and turn it upside down: ISSES — not quite a word, sorry.
  • ➕ 53551 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1101000100101111
  • 🏠 Its numerical neighbours: 53550 (Juda, WI, 47 mi away) and 53553 (Linden, WI, 71 mi away).
  • 🔄 Backwards, 53551 becomes 15535 — and that is a real ZIP code: Clearville, PA, 586 miles away.
  • 👥 9 other ZIP codes are made of exactly the same digits (15535, 15553, 31555, 35551, 51355, 51535, …). The farthest-flung twin is 31555 in Odum, GA, 871 miles away.
  • 🧭 Farther north than 83% of all ZIP codes, and farther west than 53%.
  • 🎯548 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 53551 and you would come out at 43.08°S, 91.08°E — 1,083 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 22m of daylight. Shortest: 8h 59m.
  • 📏 At 39.6 square miles of land, 53551 is bigger than 53% of ZIP codes — room for about 30 Central Parks.
🌙 The sky over 53551 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population9,731This ZIP9,731
Households3,769This ZIP3,769
Housing units4,177This ZIP4,177
Median age41.0This ZIP41.0Wisconsin40.2US 38.9
Median household income$94,401This ZIP$94,401Wisconsin$77,485US $80,734
Median home value$357,400This ZIP$357,400Wisconsin$266,500US $332,700
Median gross rent$1,201This ZIP$1,201Wisconsin$1,087US $1,413
Bachelor's degree or higher45.3%This ZIP45.3%
Mean commute23.9 minThis ZIP23.9 min
Population density246.0 / sq miThis ZIP246.0 / sq mi

Business and tax activity

Business establishments232This ZIP232
Employees2,607This ZIP2,607
Annual payroll$126,751,000This ZIP$126,751,000
Tax returns filed4,770This ZIP4,770
Total adjusted gross income$481,776,000This ZIP$481,776,000

Land area

Land area39.55 sq miThis ZIP39.55 sq mi
Water area2.42 sq miThis ZIP2.42 sq mi

Other place names in 53551

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

ZIP codes near 53551

ZIPCityDistance
53038 Johnson Creek, WI 6.3 mi
53594 Waterloo, WI 7.7 mi
53523 Cambridge, WI 8.7 mi
53531 Deerfield, WI 9.4 mi
53549 Jefferson, WI 10.0 mi
53559 Marshall, WI 10.3 mi
53094 Watertown, WI 10.3 mi
53538 Fort Atkinson, WI 12.0 mi
53137 Helenville, WI 13.4 mi
53527 Cottage Grove, WI 14.1 mi

Find every ZIP code within 10 miles of 53551 →

Questions about this ZIP code

Where is ZIP code 53551?

53551 is in Lake Mills, Wisconsin, in Jefferson County, part of the Watertown-Fort Atkinson, WI micropolitan area. Its published point location is 43.0795, -88.9161.

What county is 53551 in?

53551 lies in Jefferson County.

What area code is 53551?

Lake Mills uses area codes 920 and 274, from NANPA's telephone records.

What time zone is 53551 in?

53551 uses America/Chicago.

How many people live in 53551?

About 9,731 people live in ZIP code 53551, in 3,769 households, at 246.0 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 53551?

$94,401 a year, against $77,485 across Wisconsin.

What ZIP codes are near 53551?

The closest are 53038 (6.3 mi), 53594 (7.7 mi), 53523 (8.7 mi), 53531 (9.4 mi) and 53549 (10 mi).

Is 53551 a PO Box ZIP code?

53551 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “53551 ZIP Code — Lake Mills, Wisconsin (Jefferson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/53551

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