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/501

ZIP codes starting with 501

ZIP codes
69
States
IA
Largest city
Marshalltown, IA
Population
191,820

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 501xx

ZIP codes starting with 501
ZIP City Type Population Median income Median home
50101 Galt , IA Standard 57 $173,542 $45,000
50102 Garden City , IA Standard 36 — $110,200
50103 Garden Grove , IA Standard 453 $64,063 $94,100
50104 Gibson , IA Standard 103 $55,625 $189,600
50105 Gilbert , IA Standard 1,487 $130,083 $275,400
50106 Gilman , IA Standard 1,163 $101,193 $118,900
50107 Grand Junction , IA Standard 764 $69,022 $92,200
50108 Grand River , IA Standard 376 $38,125 $46,300
50109 Granger , IA Standard 3,309 $118,669 $370,100
50110 Gray , IA Standard 29 $57,250 $45,000
50111 Grimes , IA Standard 16,865 $120,769 $308,800
50112 Grinnell , IA Standard 11,862 $67,078 $214,900
50115 Guthrie Center , IA Standard 2,809 $73,848 $147,900
50116 Hamilton , IA Standard 261 $47,143 $168,200
50117 Hamlin , IA Standard 128 $104,167 $222,700
50118 Hartford , IA Standard 920 $73,750 $179,800
50119 Harvey , IA Standard 392 $59,750 $154,200
50120 Haverhill , IA Standard 428 $142,662 $177,000
50122 Hubbard , IA Standard 1,297 $81,739 $115,500
50123 Humeston , IA Standard 883 $62,500 $114,800
50124 Huxley , IA Standard 4,859 $114,904 $305,200
50125 Indianola , IA Standard 20,121 $84,848 $258,900
50126 Iowa Falls , IA Standard 6,368 $55,185 $133,300
50127 Ira , IA Standard 10 — —
50128 Jamaica , IA Standard 330 $61,250 $122,900
50129 Jefferson , IA Standard 5,014 $60,671 $166,100
50130 Jewell , IA Standard 1,468 $78,594 $169,000
50131 Johnston , IA Standard 24,583 $106,551 $369,400
50132 Kamrar , IA Standard 427 $83,056 $171,600
50133 Kellerton , IA Standard 528 $58,375 $99,300
50134 Kelley , IA Standard 770 $111,250 $300,000
50135 Kellogg , IA Standard 1,754 $65,250 $165,200
50136 Keswick , IA Standard 376 $75,625 $97,800
50137 Killduff , IA Standard 114 — $187,500
50138 Knoxville , IA Standard 11,117 $74,693 $196,700
50139 Lacona , IA Standard 1,025 $72,400 $151,600
50140 Lamoni , IA Standard 2,842 $57,443 $121,900
50141 Laurel , IA Standard 587 $77,500 $139,500
50142 Le Grand , IA Standard 720 $76,250 $145,700
50143 Leighton , IA Standard 538 $86,023 $314,600
50144 Leon , IA Standard 2,692 $63,333 $130,800
50145 Liberty Center , IA Standard 139 $50,962 $232,100
50146 Linden , IA Standard 577 $109,261 $425,500
50147 Lineville , IA Standard 463 $38,281 $102,900
50148 Liscomb , IA Standard 406 $84,083 $97,200
50149 Lorimor , IA Standard 883 $59,167 $136,200
50150 Lovilia , IA Standard 736 $63,516 $124,500
50151 Lucas , IA Standard 727 $91,061 $149,400
50152 Luther , IA Standard 138 $93,750 $183,300
50153 Lynnville , IA Standard 890 $73,798 $181,300
50154 Mc Callsburg , IA Standard 394 $69,219 $187,500
50155 Macksburg , IA Standard 94 $33,125 $95,000
50156 Madrid , IA Standard 4,575 $98,054 $243,800
50157 Malcom , IA Standard 473 $115,000 $157,500
50158 Marshalltown , IA Standard 31,396 $70,367 $140,700
50160 Martensdale , IA Standard 569 $57,500 $181,400
50161 Maxwell , IA Standard 2,296 $98,519 $256,500
50162 Melbourne , IA Standard 1,164 $71,417 $176,600
50163 Melcher Dallas , IA Standard 689 $73,618 $97,800
50164 Menlo , IA Standard 682 $80,188 $151,000
50165 Millerton , IA Standard 44 $89,375 $135,900
50166 Milo , IA Standard 2,023 $107,279 $252,900
50167 Minburn , IA Standard 592 $70,167 $163,300
50168 Mingo , IA Standard 826 $113,750 $300,000
50169 Mitchellville , IA Standard 3,667 $83,938 $227,000
50170 Monroe , IA Standard 3,024 $88,704 $217,000
50171 Montezuma , IA Standard 2,524 $65,000 $216,000
50173 Montour , IA Standard 705 $96,250 $204,900
50174 Murray , IA Standard 1,259 $67,250 $132,400

Cite this page

zipcodes.pro. “ZIP codes starting with 501.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/501

Underlying data is public domain or openly licensed — sources, vintages and licences.