There are 20 zip codes in Woodbury County, Iowa. The most populated is 51106, located in Sioux City. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5110627,652Sioux City
5110422,759Sioux City
5110317,005Sioux City
5110511,214Sioux City
510545,416Sergeant Bluff
510392,648Moville
510301,586Lawton
510551,271Sloan
510161,118Correctionville
511011,070Sioux City
510261,057Hornick
510521,001Salix
51004863Anthon
51007569Bronson
51019566Danbury
51048525Pierson
51056464Smithland
51044216Oto
51111124Sioux City
5101571Climbing Hill

Zip Codes in Woodbury County, Iowa by Population (2024)