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

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

Kapaau leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.

 

About 55% of adults in Kapaau typically vote, below the U.S. average of about 62%. Among adults in Kapaau, ~35% vote Democratic, ~20% Republican, and ~45% don't vote. The map below shows estimated turnout by block group.

How Kapaau compares

Among cities within 25 miles, Kapaau leans more Democratic than 10 of 14 neighbors.

Politically, Kapaau sits close to the rest of Hawaii.

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

Areas with many never-married adults vote Democratic. About 37% of adults in Kapaau have never been married, modestly above similar-sized cities (around 24%).

Population density and Democratic lean

Places with high population density tend to lean Democratic; Kapaau, HI sits in the top quarter nationally on this measure.

Why turnout in Kapaau looks the way it does

Crowded housing lines up with lower turnout. About 8% of homes in Kapaau have more than one occupant per room, above 95% 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 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.