On Tuesday, November 5 2019, Sioux County will hold a City/School Election. Sample ballots can be found here. Friday, October 25 is the deadline to mail absentee ballots. Absentee voting in person in the Auditor’s office is available regular business hours of 8:00 a.m. to 4:30 p.m., and until 5:00 p.m. on Friday, October 25, Friday, November 1, and Monday, November 4. The pre-registration deadline is 5:00 p.m., Friday, October 25.