About 51109 - Sioux City, Iowa
ZIP code 51109 covers the community of Sioux City in Iowa, the United States. This area falls under Sioux City County County.
Census data puts the population of this ZIP code at 35,437 residents. This puts it well ahead of the typical ZIP code in Iowa (roughly 22,608).
Median household income is about $79,900 (above the Iowa average).
Nearby communities in Iowa include Montour, Cresco, Davenport.