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/513

ZIP codes starting with 513

ZIP codes
23
States
IA
Largest city
Spencer, IA
Population
47,230

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 513xx

ZIP codes starting with 513
ZIP City Type Population Median income Median home
51301 Spencer , IA Standard 12,638 $63,402 $188,300
51331 Arnolds Park , IA Standard 935 $89,167 $448,800
51333 Dickens , IA Standard 374 $110,833 $195,600
51334 Estherville , IA Standard 6,960 $57,482 $112,000
51338 Everly , IA Standard 852 $57,500 $125,200
51340 Fostoria , IA Standard 75 $90,250 $133,800
51341 Gillett Grove , IA Standard 40 — $61,000
51342 Graettinger , IA Standard 1,385 $84,866 $108,900
51343 Greenville , IA Standard 172 $60,625 $98,800
51345 Harris , IA Standard 347 $54,301 $141,700
51346 Hartley , IA Standard 2,247 $72,426 $156,800
51347 Lake Park , IA Standard 1,470 $82,750 $201,600
51350 Melvin , IA Standard 383 $77,250 $79,300
51351 Milford , IA Standard 4,988 $73,824 $273,100
51354 Ocheyedan , IA Standard 965 $72,639 $115,400
51355 Okoboji , IA Standard 1,048 $72,262 $421,100
51357 Royal , IA Standard 910 $68,333 $118,500
51358 Ruthven , IA Standard 1,213 $64,583 $150,500
51360 Spirit Lake , IA Standard 8,653 $75,882 $271,700
51363 Superior , IA Standard 111 $75,625 $82,900
51364 Terril , IA Standard 803 $66,875 $156,900
51365 Wallingford , IA Standard 416 $71,667 $129,300
51366 Webb , IA Standard 245 $87,500 $130,800

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zipcodes.pro. “ZIP codes starting with 513.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/513

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