Mayor & City Council Special Election: Tuesday, May 21st. Polls open beginning at  7:00 a.m. and continue until 8:00 pm, located on the 3rd floor of the Sheldon Community Building. Absentee voters can request a ballot to be mailed to them. The deadline for ballots must be mailed to the auditor by Friday, May 10 at 5:00 p.m.  People can vote in the auditor’s office until 5:00 p.m. on May 20th.