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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/53545

53545

ZIP 53545 is in Janesville, Wisconsin, in Rock County; area code 608; Central time. Janesville has 4 ZIP codes; the others are 53546, 53547 and 53548.

Type
Standard
Time zone
America/Chicago
County
Rock
Population
24,703
Coordinates
42.7387, -89.0402
☼ Live from 53545 — Janesville, WI

Weather right now

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Local time: —

Where 53545 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 53545
  • 🔢 Type 53545 into a pocket calculator and turn it upside down: ShSES — not quite a word, sorry.
  • ➕ As a number, 53,545 = 5 × 10709. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1101000100101001
  • 🏠 Its numerical neighbours: 53544 (Hollandale, WI, 45 mi away) and 53546 (Janesville, WI, 8 mi away).
  • 🔄 Backwards, 53545 becomes 54535, which is not a ZIP code at all.
  • 👥 7 other ZIP codes are made of exactly the same digits (35545, 35554, 43555, 53554, 55345, 55354, …). The farthest-flung twin is 35545 in Belk, AL, 631 miles away.
  • 🧭 Farther north than 81% of all ZIP codes, and farther west than 53%.
  • 🎯534 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 53545 and you would come out at 42.74°S, 90.96°E — 1,090 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 20m of daylight. Shortest: 9h 02m.
  • 📏 At 22.5 square miles of land, 53545 is bigger than 40% of ZIP codes — room for about 17 Central Parks.
🌙 The sky over 53545 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population24,703This ZIP24,703
Households10,909This ZIP10,909
Housing units11,266This ZIP11,266
Median age40.8This ZIP40.8Wisconsin40.2US 38.9
Median household income$73,889This ZIP$73,889Wisconsin$77,485US $80,734
Median home value$220,700This ZIP$220,700Wisconsin$266,500US $332,700
Median gross rent$1,062This ZIP$1,062Wisconsin$1,087US $1,413
Bachelor's degree or higher29.8%This ZIP29.8%
Mean commute23.1 minThis ZIP23.1 min
Population density1,097.6 / sq miThis ZIP1,097.6 / sq mi

Business and tax activity

Business establishments773This ZIP773
Employees15,292This ZIP15,292
Annual payroll$768,912,000This ZIP$768,912,000
Tax returns filed11,990This ZIP11,990
Total adjusted gross income$907,838,000This ZIP$907,838,000

Land area

Land area22.51 sq miThis ZIP22.51 sq mi
Water area0.35 sq miThis ZIP0.35 sq mi

Other place names in 53545

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

ZIP codes near 53545

ZIPCityDistance
53547 Janesville, WI 0.8 mi
53548 Janesville, WI 5.7 mi
53563 Milton, WI 6.2 mi
53546 Janesville, WI 7.6 mi
53534 Edgerton, WI 8.9 mi
53501 Afton, WI 9.5 mi
53542 Hanover, WI 9.5 mi
53537 Footville, WI 9.8 mi
53536 Evansville, WI 11.7 mi
53505 Avalon, WI 12.4 mi

Find every ZIP code within 10 miles of 53545 →

Questions about this ZIP code

Where is ZIP code 53545?

53545 is in Janesville, Wisconsin, in Rock County, part of the Janesville-Beloit, WI metropolitan area. Its published point location is 42.7387, -89.0402.

What county is 53545 in?

53545 lies in Rock County.

What area code is 53545?

Janesville uses area code 608, from NANPA's telephone records.

What time zone is 53545 in?

53545 uses America/Chicago.

How many people live in 53545?

About 24,703 people live in ZIP code 53545, in 10,909 households, at 1,097.6 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 53545?

$73,889 a year, against $77,485 across Wisconsin.

What ZIP codes are near 53545?

The closest are 53547 (0.8 mi), 53548 (5.7 mi), 53563 (6.2 mi), 53546 (7.6 mi) and 53534 (8.9 mi).

Is 53545 a PO Box ZIP code?

53545 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “53545 ZIP Code — Janesville, Wisconsin (Rock County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/53545

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