Sioux City, IA zip codes
Sioux City, Iowa has 9 zip codes (8 residential, 1 PO box or single-organization). Most of it is in Woodbury County. Together these zip codes are home to about 90K people.
Zip codes
9
Population
90K
All zips combined
Largest zip
51106
28,592 residents
Income range
$15K–$81K
Median by zip