Woodbury County
Also known as Woodbury County, Iowa, Woodbury County, IA
county in Iowa, United States
Key facts
- Country
- United States
- State
- Iowa
- Founded
- January 15, 1851 (created), March 7, 1853 (organized)
- Named after
- Levi Woodbury
- Seat
- Sioux City
- Largest city
- Sioux City
- Total
- 877.836 sq mi (2,273.58 km )
- Land
- 872.896 sq mi (2,260.79 km )
- Water
- 4.940 sq mi (12.79 km ) 0.56%
- Estimate 2025
- 106,649
- Density
- 121.367/sq mi (46.8602/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
Article
Woodbury County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 105,941, and was estimated to be 106,649 in 2025, making it the seventh-most populous county in Iowa. The county seat and the largest city is Sioux City.
Woodbury County is included in the Sioux City metropolitan area.