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/542

ZIP codes starting with 542

ZIP codes
30
States
WI
Largest city
Manitowoc, WI
Population
131,863

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 542xx

ZIP codes starting with 542
ZIP City Type Population Median income Median home
54201 Algoma , WI Standard 5,209 $67,542 $183,200
54202 Baileys Harbor , WI Standard 1,772 $73,784 $432,200
54204 Brussels , WI Standard 2,139 $79,803 $379,800
54205 Casco , WI Standard 2,229 $90,781 $252,900
54207 Collins , WI Standard 176 $58,125 $160,400
54208 Denmark , WI Standard 6,231 $95,509 $301,100
54209 Egg Harbor , WI Standard 1,485 $77,188 $386,700
54210 Ellison Bay , WI Standard 942 $77,159 $356,000
54211 Ephraim , WI Standard 403 $100,938 $500,000
54212 Fish Creek , WI Standard 980 $104,531 $500,000
54213 Forestville , WI Standard 1,395 $97,292 $206,800
54214 Francis Creek , WI Standard 436 $87,500 $260,700
54215 Kellnersville , WI Standard 186 $46,000 $155,100
54216 Kewaunee , WI Standard 6,075 $83,813 $185,800
54217 Luxemburg , WI Standard 8,022 $89,489 $284,700
54220 Manitowoc , WI Standard 40,949 $66,035 $176,300
54221 Manitowoc , WI No street area — — —
54226 Maplewood , WI No street area — — —
54227 Maribel , WI Standard 1,621 $87,500 $247,000
54228 Mishicot , WI Standard 2,762 $71,842 $184,800
54229 New Franken , WI Standard 4,329 $97,135 $300,100
54230 Reedsville , WI Standard 4,158 $87,688 $227,200
54232 Saint Nazianz , WI Standard 907 $57,895 $139,200
54234 Sister Bay , WI Standard 2,158 $74,583 $456,300
54235 Sturgeon Bay , WI Standard 17,749 $70,212 $297,300
54240 Tisch Mills , WI No street area — — —
54241 Two Rivers , WI Standard 14,120 $61,014 $156,300
54245 Valders , WI Standard 2,069 $85,302 $226,700
54246 Washington Island , WI Standard 803 $70,000 $322,200
54247 Whitelaw , WI Standard 2,558 $78,417 $202,500

Cite this page

zipcodes.pro. “ZIP codes starting with 542.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/542

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