Irvine leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 64% of adults in Irvine typically vote, near the U.S. average of about 62%. Among adults in Irvine, ~17% vote Democratic, ~47% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How Irvine compares
Among cities within 25 miles, Irvine leans more Republican than 30 of 76 neighbors.
Irvine runs about 46 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by neighborhood within Irvine. The northwest side is the most Republican-leaning (R+54) and the south side is the least Republican-leaning (R+43), a spread of about 11 points.
Why Irvine 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 Irvine, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Irvine, about 99% of residents are non-Hispanic white, about 26 points above the U.S. average of 72%; about 15% of adults hold a bachelor's degree, about 10 points below the Pennsylvania average of 26%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Irvine, PA sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Irvine looks the way it does
Turnout in Irvine sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Youngsville, PA R+47
- Starbrick, PA R+43
- Pittsfield, PA R+55
- Warren, PA R+25
- Putnamville, PA R+46
- Chandlers Valley, PA R+56
- North Warren, PA R+42
- Garland, PA R+55
- Clarendon, PA R+51
- Stoneham, PA R+54
Cities with Similar Populations
- Lazbuddie, TX R+82
- Byers, TX R+78
- Hume, VA R+26
- Chamisal, NM D+28
- Beaman, IA R+42
- La Harpe, KS R+62
- Kelford, NC D+51
- Bowmansville, PA R+52
- Mount Harmony, WV R+46
- Sideview, KY R+61
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Sources and methodology
Precinct-level voting records used to fit the model come from Pennsylvania Department of State, Bureau of 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.