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/520

ZIP codes starting with 520

ZIP codes
46
States
IA
Largest city
Dubuque, IA
Population
145,590

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 520xx

ZIP codes starting with 520
ZIP City Type Population Median income Median home
52001 Dubuque , IA Standard 43,101 $61,643 $178,000
52002 Dubuque , IA Standard 17,005 $91,036 $298,900
52003 Dubuque , IA Standard 13,796 $98,908 $286,100
52004 Dubuque , IA No street area — — —
52030 Andrew , IA Standard 423 $66,343 $121,300
52031 Bellevue , IA Standard 5,403 $86,674 $244,600
52032 Bernard , IA Standard 1,305 $88,500 $269,000
52033 Cascade , IA Standard 3,292 $69,023 $214,100
52035 Colesburg , IA Standard 1,331 $62,109 $138,500
52036 Delaware , IA Standard 135 $85,208 $144,100
52037 Delmar , IA Standard 1,172 $90,813 $198,400
52038 Dundee , IA Standard 463 $56,250 $165,000
52039 Durango , IA Standard 1,079 $79,345 $330,700
52040 Dyersville , IA Standard 5,584 $84,761 $242,300
52041 Earlville , IA Standard 1,468 $89,697 $188,800
52042 Edgewood , IA Standard 1,804 $95,833 $234,300
52043 Elkader , IA Standard 2,058 $76,705 $165,000
52044 Elkport , IA Standard 297 $75,792 $97,000
52045 Epworth , IA Standard 2,777 $91,667 $263,500
52046 Farley , IA Standard 3,129 $96,151 $273,600
52047 Farmersburg , IA Standard 462 $59,250 $95,800
52048 Garber , IA Standard 201 $56,477 $65,800
52049 Garnavillo , IA Standard 1,370 $61,964 $170,800
52050 Greeley , IA Standard 422 $67,206 $231,900
52052 Guttenberg , IA Standard 2,999 $61,528 $197,400
52053 Holy Cross , IA Standard 1,148 $83,000 $251,900
52054 La Motte , IA Standard 794 $103,819 $225,000
52056 Luxemburg , IA Standard 229 $83,750 $182,800
52057 Manchester , IA Standard 8,193 $69,635 $184,300
52060 Maquoketa , IA Standard 8,007 $68,143 $158,300
52064 Miles , IA Standard 685 $74,583 $139,800
52065 New Vienna , IA Standard 671 $99,250 $218,600
52066 North Buena Vista , IA Standard 124 $51,563 $104,200
52068 Peosta , IA Standard 5,280 $125,901 $361,700
52069 Preston , IA Standard 1,743 $75,313 $169,500
52070 Sabula , IA Standard 990 $79,271 $173,000
52071 Saint Donatus , IA Standard 135 $44,141 $203,300
52072 Saint Olaf , IA Standard 454 $62,250 $121,000
52073 Sherrill , IA Standard 1,381 $95,526 $297,400
52074 Spragueville , IA Standard 119 $86,250 $118,800
52075 Springbrook , IA Standard 125 $53,750 $151,000
52076 Strawberry Point , IA Standard 2,258 $72,857 $150,700
52077 Volga , IA Standard 313 $77,188 —
52078 Worthington , IA Standard 870 $97,778 $237,500
52079 Zwingle , IA Standard 995 $101,120 $237,800
52099 Dubuque , IA No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 520.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/520

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