THE SIOUX CITY LAND BRIEF
Land in the
Western Loess Hills setting.
Sioux City city has 59.4 square miles of land in Plymouth County, Woodbury County. Its Census reference point is in Western Loess Hills, within Western Corn Belt Plains.
Glacial till plains and windblown loess hills make up the Western Corn Belt landscape. Near-level and rolling terrain are interspersed with steeper river valleys and hills.
Regional context: Western Corn Belt Plains ↗ · Classification at the Census reference point
One place name. 2 county geographies.
Sioux City intersects 2 county geographies: Plymouth County, Woodbury County. A Sioux City mailing address alone cannot choose the right record office; use the county and parcel identifier on the tax bill or deed.
Sioux City by land and water
The Census records 1.17 square miles of water within Sioux City, or 1.9% of its total area. It is 1.2 percentage points higher than the 0.7% recorded for Iowa. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sioux City city has 20 times the land area of nearby Sergeant Bluff city (2.97 square miles). These areas describe boundaries, not comparable property prices.

