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/506

ZIP codes starting with 506

ZIP codes
70
States
IA
Largest city
Cedar Falls, IA
Population
168,577

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 506xx

ZIP codes starting with 506
ZIP City Type Population Median income Median home
50601 Ackley , IA Standard 2,299 $66,250 $127,200
50602 Allison , IA Standard 1,254 $67,188 $118,100
50603 Alta Vista , IA Standard 555 $74,271 $122,700
50604 Aplington , IA Standard 1,590 $66,776 $168,200
50605 Aredale , IA Standard 63 $23,125 $69,400
50606 Arlington , IA Standard 803 $61,346 $130,000
50607 Aurora , IA Standard 403 $54,583 $143,300
50608 Austinville , IA Standard 24 — —
50609 Beaman , IA Standard 377 $90,250 $241,700
50611 Bristow , IA Standard 364 $84,250 $93,300
50612 Buckingham , IA Standard 369 $99,602 $291,900
50613 Cedar Falls , IA Standard 43,867 $78,503 $270,800
50614 Cedar Falls , IA No street area — — —
50616 Charles City , IA Standard 9,358 $64,830 $140,600
50619 Clarksville , IA Standard 2,150 $84,076 $163,200
50620 Colwell , IA Standard 36 — $102,800
50621 Conrad , IA Standard 1,601 $88,077 $214,700
50622 Denver , IA Standard 3,549 $95,089 $254,100
50623 Dewar , IA Standard 153 $93,750 $170,800
50624 Dike , IA Standard 1,855 $96,713 $260,100
50625 Dumont , IA Standard 930 $64,250 $86,600
50626 Dunkerton , IA Standard 1,468 $84,306 $209,400
50627 Eldora , IA Standard 3,276 $74,536 $131,600
50628 Elma , IA Standard 1,423 $68,750 $153,500
50629 Fairbank , IA Standard 2,082 $103,106 $207,100
50630 Fredericksburg , IA Standard 1,372 $71,518 $198,900
50631 Frederika , IA Standard 225 $58,750 $98,800
50632 Garwin , IA Standard 1,201 $71,667 $132,700
50633 Geneva , IA Standard 423 $71,775 $96,300
50634 Gilbertville , IA Standard 761 $79,583 $197,400
50635 Gladbrook , IA Standard 1,423 $81,125 $154,700
50636 Greene , IA Standard 2,186 $70,066 $154,700
50638 Grundy Center , IA Standard 3,441 $85,223 $185,200
50641 Hazleton , IA Standard 1,950 $67,115 $156,000
50642 Holland , IA Standard 577 $108,750 $178,900
50643 Hudson , IA Standard 3,027 $125,804 $244,400
50644 Independence , IA Standard 8,419 $80,026 $186,600
50645 Ionia , IA Standard 1,193 $64,408 $114,600
50647 Janesville , IA Standard 1,978 $104,063 $314,200
50648 Jesup , IA Standard 4,269 $95,353 $226,400
50649 Kesley , IA Standard 12 — —
50650 Lamont , IA Standard 648 $57,500 $120,500
50651 La Porte City , IA Standard 3,147 $88,333 $187,600
50652 Lincoln , IA Standard 113 $65,000 $97,800
50653 Marble Rock , IA Standard 486 $79,250 $163,300
50654 Masonville , IA Standard 275 $53,264 $124,100
50655 Maynard , IA Standard 739 $58,750 $141,300
50657 Morrison , IA Standard 96 $66,250 $95,000
50658 Nashua , IA Standard 2,450 $71,936 $155,100
50659 New Hampton , IA Standard 5,688 $78,153 $206,900
50660 New Hartford , IA Standard 1,143 $95,969 $190,900
50661 North Washington , IA No street area — — —
50662 Oelwein , IA Standard 6,576 $48,646 $107,700
50664 Oran , IA Standard 63 $51,741 $157,300
50665 Parkersburg , IA Standard 2,693 $75,521 $217,700
50666 Plainfield , IA Standard 753 $79,867 $203,700
50667 Raymond , IA Standard 899 $76,711 $222,600
50668 Readlyn , IA Standard 1,216 $85,956 $174,000
50669 Reinbeck , IA Standard 2,439 $81,650 $183,000
50670 Shell Rock , IA Standard 2,270 $84,679 $171,500
50671 Stanley , IA Standard 182 $57,212 $107,800
50672 Steamboat Rock , IA Standard 611 $73,333 $158,500
50673 Stout , IA Standard 250 $66,875 $122,300
50674 Sumner , IA Standard 3,446 $72,794 $174,100
50675 Traer , IA Standard 2,198 $75,938 $156,900
50676 Tripoli , IA Standard 2,017 $87,115 $154,500
50677 Waverly , IA Standard 12,673 $85,633 $232,800
50680 Wellsburg , IA Standard 1,027 $75,956 $140,900
50681 Westgate , IA Standard 481 $73,333 $112,500
50682 Winthrop , IA Standard 1,692 $89,375 $183,800

Cite this page

zipcodes.pro. “ZIP codes starting with 506.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/506

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