Waipahu, HI Political Map | Democrat & Republican Areas in Waipahu

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

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

 

About 44% of adults in Waipahu typically vote, below the U.S. average of about 62%. Among adults in Waipahu, ~24% vote Democratic, ~20% Republican, and ~56% don't vote. The map below shows estimated turnout by block group.

How Waipahu compares

Among cities within 25 miles, Waipahu leans more Democratic than 15 of 35 neighbors.

Waipahu runs about 13 points more Republican than Hawaii as a whole.

Politics vary noticeably by neighborhood within Waipahu. The north side is the most Democratic-leaning (D+15) and the east side is the least Democratic-leaning (D+5), a spread of about 10 points.

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

Areas with many never-married adults vote Democratic. About 35% of adults in Waipahu have never been married, about 6 points above the U.S. average of 29%.

Homeownership and voter turnout

Places with renter-heavy households tend to turn out at a lower rate; Waipahu, HI sits in the bottom quarter nationally on this measure.

Why turnout in Waipahu looks the way it does

Crowded housing lines up with lower turnout. About 14% of homes in Waipahu have more than one occupant per room, above 98% of cities. Renters vote less often than owners, and about 34% of households in Waipahu rent, compared to around 50% in nearby 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 Hawaii Office 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. Some land-use inputs for Hawaii, including walkability and the environmental-justice index, are estimated rather than measured, so the figures here carry added uncertainty. Full methodology and findings: political spectrum map.

Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.