The latest figures show that nearly 20 percent of Oregon voters have returned their ballots for Tuesday's election. State officials say a significant increase in ballot returns would be needed to stick with historic trends.
More than two million Oregonians are eligible to vote in the May primary, but only about 420,000 ballots have been returned so far. That's according to online data from the Secretary of State's Office.
Voters have until 8 p.m. Tuesday to turn in their ballots and have them count for this year's primary.
Tony Green is with the Secretary of State's Office. He says historically about 30 percent of the ballots are returned on the last day.
"Some people wait until the last minute, some people try and mail that ballot in as soon as they get it and that's where we see the two surges--much less movement in the middle," Green says.
Gilliam, Curry, and Lake counties lead the way with the highest percentages of ballots returned. Multnomah, Benton, and Marion counties have the lowest rate of returns.
This story originally appeared on Oregon Public Broadcasting.