Pittsburg leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 44% of adults in Pittsburg typically vote, below the U.S. average of about 62%. Among adults in Pittsburg, ~30% vote Democratic, ~14% Republican, and ~56% don't vote. The map below shows estimated turnout by block group.
How Pittsburg compares
Among cities within 25 miles, Pittsburg leans more Democratic than 41 of 66 neighbors.
Pittsburg runs about 18 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Pittsburg. The east side is the most Democratic-leaning (D+52) and the southwest side is the least Democratic-leaning (D+31), a spread of about 21 points.
Why Pittsburg leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Pittsburg, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 82% of residents in Pittsburg live in densely developed areas, about 46 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 38% of adults in Pittsburg have never been married, above 92% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Pittsburg, CA sits in the top tenth nationally on this measure.
Why turnout in Pittsburg looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Pittsburg is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 35% of households in Pittsburg rent, above 90% of cities. High food insecurity lines up with lower turnout, and about 22% of adults in Pittsburg report food insecurity, above 86% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Bay Point, CA D+37
- Clayton, CA D+14
- Antioch, CA D+34
- Concord, CA D+33
- Bridgehead, CA R+8
- Birds Landing, CA R+33
- Pleasant Hill, CA D+41
- Oakley, CA D+2
- Walnut Creek, CA D+47
- Cordelia, CA Even
Cities with Similar Populations
- Scranton, PA D+14
- Springfield, OR D+8
- Battle Creek, MI Even
- Jupiter, FL R+20
- Charleston, WV R+5
- Pawtucket, RI D+26
- Auburn, AL D+3
- Warwick, RI D+8
- Southfield, MI D+70
- Caldwell, ID R+37
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.