(Salem, OR) -- Ballots should be arriving in mailboxes over the next few days for Oregon's May Primary. If you are a registered voter and haven't received your ballot by May 7th, you're urged to contact your County Clerk. Under Oregon law, ballots must be received by a county Elections office or at a ballot drop site by 8 p.m. on Election Day, May 19th, or be postmarked by that day, to be counted. Oregon's Secretary of State asks voters who are mailing their ballot to not wait until the last day. You can also use an official ballot drop box.