Sioux City, Iowa

9 ZIP codes · Central time

ZIP codes (largest first)

51106 · 28,59251104 · 23,19751103 · 16,89551105 · 10,41551108 · 5,96051109 · 3,60651101 · 1,03151111 · 3951102 (PO box)
Population86,101
StateIowa
CountyWoodbury County, Plymouth County
Time zoneCentral
Land area59.15 sq mi

Area codes in this area

712

These are the area codes that most often serve Sioux City (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Find the ZIP+4 for an address in Sioux City

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Population: U.S. Census Bureau, ACS 5-year estimates, 2024.