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Fact check: Which California counties have the highest percentage of Democratic voters?

Checked on August 21, 2025

1. Summary of the results

The analyses provided do not directly answer the question about which California counties have the highest percentage of Democratic voters. Instead, the sources focus on electoral shifts and voting patterns in the 2024 election.

The available data shows that California remains a solidly Democratic state, with Vice President Kamala Harris receiving 58.5% of all votes cast in California's 2024 general election [1]. However, the sources reveal significant shifts in voting patterns, with 10 counties that had voted for Democrat Joe Biden in 2020 shifting to Donald Trump in 2024 [2] [1].

The specific counties that flipped from Democratic to Republican include Orange, Riverside, San Bernardino, Inyo, Fresno, Merced, Butte, Nevada, San Joaquin, and Stanislaus counties [3]. This information indicates which counties have lower Democratic percentages, but does not identify the counties with the highest Democratic voter percentages.

2. Missing context/alternative viewpoints

The analyses reveal several important contextual factors missing from a simple county-by-county Democratic percentage breakdown:

  • California's ideological shift: The sources indicate that "California's ideological needle" has shifted to the right [2], suggesting that even traditionally Democratic counties may be experiencing declining Democratic support.
  • Voter turnout variations: One source mentions a "notable drop in California's voter turnout during 2024 general election" [4], which could significantly impact percentage calculations of Democratic voters by county.
  • Performance comparison: Kamala Harris "did much worse in her home state than Joe Biden did in 2020" [5], indicating that Democratic performance varied even within the same party across election cycles.

The analyses focus primarily on electoral shifts and competitive counties rather than identifying the most solidly Democratic strongholds, which would be necessary to answer the original question comprehensively.

3. Potential misinformation/bias in the original statement

The original question itself does not contain misinformation or bias - it is a straightforward factual inquiry about voter demographics. However, the question may inadvertently promote a static view of political geography that doesn't account for the dynamic nature of voter preferences demonstrated in the 2024 election results.

The sources reveal that focusing solely on historical Democratic percentages by county could be misleading, as 10 counties experienced significant political realignment in just four years [3] [1]. This suggests that any answer to the original question should include temporal context about when the data was collected and acknowledge the fluid nature of political preferences at the county level.

Want to dive deeper?
What are the most Republican counties in California?
How do voter demographics in California influence state politics?
Which California counties have the highest voter turnout rates?
How have voting patterns in California changed since the 2020 election?
What role do independent voters play in California elections?