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
City
Population
51106Sioux City27,652
51104Sioux City22,759
51103Sioux City17,005
51105Sioux City11,214
51054Sergeant Bluff5,416
51039Moville2,648
51030Lawton1,586
51055Sloan1,271
51016Correctionville1,118
51101Sioux City1,070
51026Hornick1,057
51052Salix1,001
51004Anthon863
51007Bronson569
51019Danbury566
51048Pierson525
51056Smithland464
51044Oto216
51111Sioux City124
51015Climbing Hill71

Woodbury County, Iowa Zip Codes by Population (2024)