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

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

Mililani leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.

 

About 52% of adults in Mililani typically vote, below the U.S. average of about 62%. Among adults in Mililani, ~30% vote Democratic, ~22% Republican, and ~48% don't vote. The map below shows estimated turnout by block group.

How Mililani compares

Among cities within 25 miles, Mililani leans more Democratic than 19 of 35 neighbors.

Mililani runs about 9 points more Republican than Hawaii as a whole.

Politics vary noticeably by neighborhood within Mililani. The south side is the most Democratic-leaning (D+18) and the north side is the least Democratic-leaning (D+5), a spread of about 13 points.

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

Areas with high college attainment vote Democratic. About 40% of adults in Mililani hold a bachelor's degree, about 12 points above the U.S. average of 28%.

Population density and Democratic lean

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

Why turnout in Mililani looks the way it does

Renters vote less often than owners. About 37% of households in Mililani rent, about 12 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and Mililani sits in the top quarter on routine-care measures. Crowded housing lines up with lower turnout, and about 4% of homes in Mililani have more than one occupant per room, above 84% 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.