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/531

ZIP codes starting with 531

ZIP codes
66
States
WI
Largest city
Oak Creek, WI
Population
697,118

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 531xx

ZIP codes starting with 531
ZIP City Type Population Median income Median home
53101 Bassett , WI No street area — — —
53102 Benet Lake , WI No street area — — —
53103 Big Bend , WI Standard 3,762 $137,083 $397,700
53104 Bristol , WI Standard 5,826 $112,000 $325,100
53105 Burlington , WI Standard 28,751 $88,770 $318,500
53108 Caledonia , WI Standard 3,060 $86,679 $296,800
53109 Camp Lake , WI No street area — — —
53110 Cudahy , WI Standard 17,853 $66,719 $216,500
53114 Darien , WI Standard 1,979 $72,708 $241,000
53115 Delavan , WI Standard 16,381 $72,304 $251,900
53118 Dousman , WI Standard 7,554 $108,772 $372,600
53119 Eagle , WI Standard 5,803 $117,759 $416,500
53120 East Troy , WI Standard 10,848 $96,345 $336,300
53121 Elkhorn , WI Standard 18,551 $85,643 $313,500
53122 Elm Grove , WI Standard 6,508 $157,962 $514,800
53125 Fontana , WI Standard 1,898 $112,500 $593,800
53126 Franksville , WI Standard 7,064 $101,206 $386,300
53127 Genesee Depot , WI Standard 79 — —
53128 Genoa City , WI Standard 9,030 $82,216 $244,400
53129 Greendale , WI Standard 14,570 $95,012 $311,800
53130 Hales Corners , WI Standard 7,712 $87,008 $308,000
53132 Franklin , WI Standard 35,433 $109,850 $367,500
53137 Helenville , WI Standard 1,650 $116,550 $366,200
53138 Honey Creek , WI No street area — — —
53139 Kansasville , WI Standard 2,523 $99,635 $305,500
53140 Kenosha , WI Standard 30,238 $58,006 $206,700
53141 Kenosha , WI No street area — — —
53142 Kenosha , WI Standard 34,144 $88,960 $268,100
53143 Kenosha , WI Standard 20,889 $68,343 $200,500
53144 Kenosha , WI Standard 26,652 $76,507 $259,600
53146 New Berlin , WI Standard 7,285 $110,035 $346,100
53147 Lake Geneva , WI Standard 18,638 $83,566 $369,100
53148 Lyons , WI No street area — — —
53149 Mukwonago , WI Standard 19,614 $110,608 $414,200
53150 Muskego , WI Standard 26,259 $109,276 $416,400
53151 New Berlin , WI Standard 32,824 $101,176 $371,200
53152 New Munster , WI No street area — — —
53153 North Prairie , WI Standard 2,548 $152,543 $430,100
53154 Oak Creek , WI Standard 37,325 $96,555 $331,700
53156 Palmyra , WI Standard 3,232 $85,313 $238,200
53157 Pell Lake , WI Standard 0 — —
53158 Pleasant Prairie , WI Standard 18,420 $105,868 $375,600
53159 Powers Lake , WI No street area — — —
53167 Rochester , WI Standard 157 $70,054 $345,200
53168 Salem , WI Standard 9,036 $97,035 $300,200
53170 Silver Lake , WI Standard 2,134 $79,931 $284,400
53171 Somers , WI No street area — — —
53172 South Milwaukee , WI Standard 20,442 $73,427 $235,700
53176 Springfield , WI Standard 100 $45,962 $264,800
53177 Sturtevant , WI Standard 8,489 $90,769 $250,000
53178 Sullivan , WI Standard 2,497 $99,875 $371,500
53179 Trevor , WI Standard 6,469 $94,460 $305,800
53181 Twin Lakes , WI Standard 7,964 $97,804 $293,500
53182 Union Grove , WI Standard 9,821 $107,068 $328,700
53183 Wales , WI Standard 3,111 $108,827 $398,700
53184 Walworth , WI Standard 4,169 $84,413 $315,100
53185 Waterford , WI Standard 18,560 $103,225 $384,600
53186 Waukesha , WI Standard 33,374 $74,588 $301,100
53187 Waukesha , WI No street area — — —
53188 Waukesha , WI Standard 34,892 $92,409 $348,600
53189 Waukesha , WI Standard 26,855 $117,008 $406,200
53190 Whitewater , WI Standard 20,499 $66,069 $265,100
53191 Williams Bay , WI Standard 3,261 $75,833 $414,600
53192 Wilmot , WI Standard 252 — $264,300
53194 Woodworth , WI No street area — — —
53195 Zenda , WI Standard 133 $95,833 $173,900

Cite this page

zipcodes.pro. “ZIP codes starting with 531.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/531

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