Sioux City (IA state) ZIP code
ZIP code of Sioux City (IA) is 51101. Below you can find map of Sioux City, or look up other ZIP codes in Iowa or other US states. If Sioux City's ZIP code is duplicated, and other places have same ZIP code number, you can use our ZIP code searcher by number 51101.
Sioux City have more then one ZIP code. List of all Sioux City's ZIP codes: 51101, 51102, 51103, 51104, 51105, 51106, 51108, 51109, 51111.