Deadine for mail-in ballot for 2021 Primary Posted on Dec 23, 2020 Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: May 18, 2021 @ 8:00 pm 2021-05-18T20:00:00-04:00 2021-05-18T20:15:00-04:00 Election Dates All mail-in ballots for the 2021 primary election must be received by Voter Services no later than 8 PM on May 18, which is also Election Day.