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 — CITY/IA/LITTLE-SIOUX

Little Sioux ZIP code, Iowa

The ZIP code for Little Sioux, IA is 51545, and its area code is 712.

USPS city name
1 ZIP code
Population
129
Area code
712
State
Iowa

ZIP codes addressed as Little Sioux

ZIP codes with the USPS city name Little Sioux
ZIP City Type Population Median income Median home
51545 Little Sioux , IA Standard 267 $70,313 $80,000

Map of Little Sioux ZIP codes

The ZIP codes of Little Sioux, IA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Little Sioux

The nearest larger towns are Pisgah (255 people, 5.4 mi), Mondamin (403 people, 6.8 mi) and Blencoe (280 people, 8.9 mi).

Towns near Little Sioux
TownPopulationDistance
Onawa 2,839 15.4 mi
Missouri Valley 2,666 18.4 mi
Blair, NE 7,914 19.2 mi

More nearby: every ZIP code in Harrison County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Little Sioux, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/little-sioux

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