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

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

Kapaa leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.

 

About 61% of adults in Kapaa typically vote, near the U.S. average of about 62%. Among adults in Kapaa, ~37% vote Democratic, ~24% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.

How Kapaa compares

Among cities within 25 miles, Kapaa leans more Democratic than 12 of 22 neighbors.

Politically, Kapaa sits close to the rest of Hawaii.

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

Areas with many never-married adults vote Democratic. About 35% of adults in Kapaa have never been married, modestly above similar-sized cities (around 30%). High college attainment predicts Democratic voting, and Kapaa sits in the top quarter (about 31%, above 76% of cities).

Homeownership and voter turnout

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

Why turnout in Kapaa looks the way it does

Crowded housing lines up with lower turnout. About 5% of homes in Kapaa have more than one occupant per room, above 88% of cities. Strong routine healthcare access lines up with higher turnout, and Kapaa sits in the top quarter on routine-care measures. Renters vote less often than owners, and about 29% of households in Kapaa rent, above 83% of cities. Learn more about the findings and methodology on the political spectrum map.

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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.