California primary sees 150,000 mail ballots rejected, highest in recent elections

California's June 2026 primary produced the highest mail-ballot rejection rate in recent memory: nearly 150,000 votes tossed, up from roughly 109,000 in the 2024 primary and 106,000 in 2022. Voting experts attribute the spike overwhelmingly to ballots arriving after Election Day with late postmarks—a literal ticking clock that disenfranchised tens of thousands, disproportionately affecting younger, mobile, and lower-income voters who rely on mailing ballots close to the deadline.

This is not an act of nature. It is a predictable failure of a system that could be corrected. California's vote-by-mail law requires ballots to be postmarked by Election Day, but the state's mail network delivers many ballots days late. The state does not accept late-arriving ballots even if they were mailed on time but processed after the deadline. Other states—Colorado, Oregon, Washington—cure this by accepting ballots that arrive within a few days after Election Day, giving voters and the postal service a reasonable grace period. California also lacks universal ballot-tracking notifications and pre-paid postage for all ballots, which would catch problems earlier and make returning a ballot costless.

The practical consequence: in a state that prides itself on expansive voter access, the largest single source of vote loss is a time-of-arrival requirement that punishes voters for the speed of the mail system. With a governor and legislature that have championed mail voting, there is no excuse not to fix this. Failing to do so is a structural barrier to voting—one that lands hardest on those already least likely to have their voices heard.