Summary (tl;dr)

California's recent June primary election saw a significant surge in mail ballot rejections, with nearly 150,000 ballots uncounted, primarily due to late arrival linked to recent changes in U.S. Postal Service (USPS) operations. This spike is raising concerns among election officials and voting rights advocates about voter disenfranchisement and election integrity.

Essential Background

California operates as an "all-mail" voting state, meaning every active registered voter automatically receives a ballot by mail for each election. To be counted, these ballots must be postmarked by Election Day and received by election officials within seven days thereafter. Historically, California has experienced some ballot rejections due to issues like late arrival or signature mismatches, but the state has also implemented measures to make voting easier and boost participation.

The Full Story

In California's June 2026 primary election, approximately 148,241 mail ballots were rejected, marking a rejection rate of 1.73% of all mail ballots, a notable increase from the 1.56% rejection rate in the 2024 primary. The overwhelming majority of these rejections, specifically 93,479 ballots, were due to late arrival. Election experts and state officials attribute this sharp rise in late ballots to recent U.S. Postal Service changes, including the consolidation of mail processing centers. These operational adjustments mean that ballots mailed on Election Day, particularly from rural communities located more than 50 miles from a processing facility, are more likely to receive a delayed postmark, rendering them ineligible for counting even if mailed by the voter in time. Counties like Tulare, Alpine, and Merced reported some of the highest rejection rates.

Why It Matters

The significant increase in rejected mail ballots in California has several implications. It raises concerns about voter access and potential disenfranchisement, especially for voters in rural areas who are disproportionately affected by USPS changes. The issue also intensifies ongoing national political debates surrounding mail-in voting, with some Republican leaders, including former President Trump, pushing for federal restrictions and challenging state-level mail ballot laws, often citing unsubstantiated claims of widespread fraud. While studies show mail voting fraud is minuscule, the high rejection rates provide fodder for these political arguments, potentially eroding public confidence in election processes. Furthermore, the late counting of ballots in California, often favoring Democratic candidates, has already sparked political uproar.

Geographic Location

• California, United States (statewide increase in mail ballot rejections for the June primary)
• Tulare County, California, United States (recorded highest ballot rejection rate in the state)
• Alpine County, California, United States (recorded high ballot rejection rate)
• Merced County, California, United States (recorded high ballot rejection rate and sevenfold increase in late ballots in Nov 2025 election)
• City of Industry, Los Angeles County, California, United States (Los Angeles County Ballot Processing Center where ballots for the June primary were sorted)
• Sacramento, Sacramento County, California, United States (State capital, where state election data is collected and where state officials address election issues)