According to the Iowa Secretary of State, you must generally drop your ballot off at your county auditor office (or at any satellite station that a county may set up) before it closes on the day BEFORE election day. Details on the location, operating hours, website, email address, and phone number for the auditor office in Woodbury County is as follows:
- 620 Douglas St., Rm. 103 , Sioux City IA 51101 (source)
- 8:00 AM – 4:30 PM, Monday – Friday
- Email: pgill@woodburycountyiowa.gov
- Website: www.woodburyiowa.com
- Phone: 712-279-6465