Supreme Court Rules States Can Count Late-Arriving Mail-In Ballots — A Win for Ballot Access Ahead of Midterms

The Supreme Court just handed down a ruling that could directly affect how your vote gets counted this November — and it wasn't the outcome many people expected.

Just over four months before the 2026 midterm elections, the Supreme Court upheld a Mississippi law that allows mail-in ballots to be counted as long as they are postmarked by, and received within five days of, Election Day. The vote was 5-4 — close, but decisive.

Here's the core question the court was answering: does federal law require your mail-in ballot to arrive by Election Day, or just be mailed by Election Day? Writing for the majority, Justice Amy Coney Barrett concluded that "the election-day statutes require the electorate's choice to be made on election day" — and that happens "so long as election day is the deadline for individuals to vote." The federal statutes, she wrote, "do not set a deadline for ballot receipt" and therefore do not prevent states from counting ballots postmarked before Election Day but received afterward. In plain English: you voted on time, your vote counts — even if the mail was slow.

What makes this ruling surprising is who wrote it. Justice Amy Coney Barrett, appointed by President Donald Trump, authored the majority opinion, joined by Chief Justice John Roberts as well as the court's three liberal justices. That's a cross-ideological coalition that nobody in Washington saw coming.

The 5-4 decision rejected a Republican-led attack on laws in more than half the states and the District of Columbia that permit mailed ballots to arrive and be counted some number of days after the election, provided they are postmarked by Election Day. If the Supreme Court had ruled the other way, 14 states, three U.S. territories and Washington, D.C. would have been forced to change their voting laws ahead of the midterm elections. That would have been a logistical nightmare — and it would have potentially disenfranchised a huge number of voters.

Just how many? Washington's Secretary of State said that more than 250,000 ballots that had been postmarked on time arrived after Election Day during the 2024 election. A Votebeat analysis of data from 11 of the 15 jurisdictions with grace periods found that more than 745,000 absentee ballots arrived after Election Day in 2024. Those are real votes from real people.

Military ballots, which often arrive after Election Day, took center stage as the case played out. In just over half the affected states, the more forgiving deadlines apply only to ballots cast by military and overseas voters. So this wasn't just a partisan talking point — it had direct implications for service members voting from overseas.

The dissent, written by Justice Samuel Alito, was sharp. Alito argued that accepting late-arriving ballots "effectively postpones the date on which the electorate's choice is made, and federal law precludes that postponement," adding that the ruling "creates a serious risk of further undermining public confidence in our elections."

President Trump did not take the decision quietly. Trump called the court ruling a "tremendous loss" and renewed his call for Congress to pass the SAVE America Act, which has made it through the House of Representatives but not the Senate. He is demanding that Congress pass the SAVE America Act, a controversial bill that purports to crack down on noncitizen voting — which is already federally illegal and rarely occurs — and would impose nationwide rules limiting mail-in voting and requiring proof of citizenship for voters.

The political path for that bill, though, looks rocky. Senate Majority Leader John Thune has repeatedly said there aren't enough Republican votes for it to pass.

Bottom line: if you vote by mail, this ruling protects you. As long as you drop your ballot in the mail by Election Day, your state — if it has a grace period — can still count it even if it shows up a few days late. That status quo is now locked in, at least for the 2026 midterms.