Rowland Heights, CA Political Map | Democrat & Republican Areas in Rowland Heights

By the BestNeighborhood data science team. Last updated May 2026.

Rowland Heights leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.

 

About 51% of adults in Rowland Heights typically vote, below the U.S. average of about 62%. Among adults in Rowland Heights, ~28% vote Democratic, ~23% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.

How Rowland Heights compares

Among cities within 25 miles, Rowland Heights leans more Democratic than 43 of 123 neighbors.

Rowland Heights runs about 10 points more Republican than California as a whole.

Politics vary noticeably by neighborhood within Rowland Heights. The west side is the most Democratic-leaning (D+16) and the southeast side is the least Democratic-leaning (Even), a spread of about 14 points.

Why Rowland Heights 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 Rowland Heights, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 88% of residents in Rowland Heights live in densely developed areas, about 52 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Rowland Heights sits in the top quarter (about 36%, above 83% of cities).

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Rowland Heights, CA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in Rowland Heights looks the way it does

Crowded housing lines up with lower turnout. About 8% of homes in Rowland Heights have more than one occupant per room, above 94% of cities. Renters vote less often than owners, and about 32% of households in Rowland Heights rent, above 87% of cities. Learn more about the findings and methodology on the political spectrum map.

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.