Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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 — PREFIX/537

ZIP codes starting with 537

ZIP codes
35
States
WI
Largest city
Madison, WI
Population
310,932

The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.

Every ZIP code in 537xx

ZIP codes starting with 537
ZIP City Type Population Median income Median home
53701 Madison , WI No street area — — —
53702 Madison , WI No street area — — —
53703 Madison , WI Standard 37,659 $47,847 $471,800
53704 Madison , WI Standard 46,730 $74,034 $318,400
53705 Madison , WI Standard 25,017 $88,549 $475,400
53706 Madison , WI Standard 3,958 $6,053 —
53707 Madison , WI No street area — — —
53708 Madison , WI No street area — — —
53711 Madison , WI Standard 51,279 $100,735 $424,600
53713 Madison , WI Standard 24,351 $58,017 $255,600
53714 Madison , WI Standard 16,169 $71,519 $306,900
53715 Madison , WI Standard 15,974 $38,996 $450,600
53716 Madison , WI Standard 18,596 $91,716 $356,800
53717 Madison , WI Standard 13,052 $98,180 $415,100
53718 Madison , WI Standard 18,989 $102,843 $363,600
53719 Madison , WI Standard 34,115 $92,052 $367,000
53725 Madison , WI No street area — — —
53726 Madison , WI Standard 5,043 $47,754 $647,300
53744 Madison , WI No street area — — —
53774 Madison , WI No street area — — —
53777 Madison , WI No street area — — —
53778 Madison , WI No street area — — —
53779 Madison , WI No street area — — —
53782 Madison , WI No street area — — —
53783 Madison , WI No street area — — —
53784 Madison , WI No street area — — —
53785 Madison , WI No street area — — —
53786 Madison , WI No street area — — —
53788 Madison , WI No street area — — —
53789 Madison , WI No street area — — —
53790 Madison , WI No street area — — —
53791 Madison , WI No street area — — —
53792 Madison , WI Standard 0 — —
53793 Madison , WI No street area — — —
53794 Madison , WI No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 537.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/537

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