
Sioux City
- County:
- Woodbury County
- County Seat:
- Yes
- Area (mi²):
- 58.878
- State:
- Iowa
Sioux City is a city located in Woodbury County, Iowa. Sioux City has a 2025 population of 85,694. It is also the county seat of .Sioux City is currently declining at a rate of -0.02% annually and its population has decreased by -0.1% since the most recent census, which recorded a population of 85,776 in 2020.
The average household income in Sioux City is $83,900 with a poverty rate of 14.63%. The median age in Sioux City is 35.4 years: 34.3 years for males, and 36.6 years for females.