North Arroyo leans heavily Democratic by roughly 42 points: about 71% of voters vote Democratic and 29% Republican.
About 75% of adults in North Arroyo typically vote, above the U.S. average of about 62%. Among adults in North Arroyo, ~53% vote Democratic, ~22% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How North Arroyo compares
Among neighborhoods within 5 miles, North Arroyo leans more Democratic than 8 of 18 neighbors.
North Arroyo runs about 21 points more Democratic than California as a whole.
Politics vary noticeably by block within North Arroyo. The northeast side is the most Democratic-leaning (D+61) and the northwest side is the least Democratic-leaning (D+13), a spread of about 48 points.
Why North Arroyo leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for North Arroyo, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 63% of adults in North Arroyo hold a bachelor's degree, about 34 points above the U.S. average of 28%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; North Arroyo, Pasadena, CA sits above the national average on this measure.
Why turnout in North Arroyo looks the way it does
Turnout in North Arroyo 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 Neighborhoods
- North Central, Pasadena, CA D+51
- Normandie Heights, Pasadena, CA D+55
- Chevy Chase, Glendale, CA D+3
- West Central, Pasadena, CA D+54
- South Arroyo, Pasadena, CA D+55
- Madison Heights, Pasadena, CA D+65
- Verdugo Woodlands, Glendale, CA D+19
- East Central, Pasadena, CA D+42
- Mid Central, Pasadena, CA D+51
- Eagle Rock, Los Angeles, CA D+49
Neighborhoods with Similar Populations
- Mission Grove, Riverside, CA Even
- North End, Fall River, MA D+4
- Willowbrook, Houston, TX D+28
- Historic Mitchell Street, Milwaukee, WI D+43
- Elk Plain, Spanaway, WA R+13
- Saint Anthony, St. Paul, MN D+73
- Memorial Park, Santa Ana, CA D+31
- Mandarin, Jacksonville, FL R+38
- Allied Gardens, San Diego, CA D+25
- Brentwood-Darlington, Portland, OR D+37
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.