About Woodbury County, Iowa
- Thompsonville (no longer existing) was the first county seat. It changed to Sergeant Bluff (then Sergeant's Bluff) in 1853 when the county's name was changed. The seat moved one more time in 1856 to Sioux City.
- Woodbury County is the third largest county by area in the state.
Woodbury County is home to 15 incorporated communities: Anthon, Bronson, Correctionville, Cushing, Danbury, Hornick, Lawton, Moville, Oto, Pierson, Salix, Sergeant Bluff, Sioux City, Sloan, and Smithland.
Many of Woodbury County's government offices can be found in the Woodbury County Courthouse, located at 620 Douglas St. in Sioux City, Iowa. The courthouse celebrated its 100th anniversary in May 2018.