99603 leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican. These figures are model estimates: Alaska did not have precinct-level voting records available for training, so the numbers above come from demographic and health features rather than local ground truth.
About 68% of adults in 99603 typically vote, above the U.S. average of about 62%. Among adults in 99603, ~31% vote Democratic, ~37% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 99603 compares
99603 runs about 5 points more Democratic than Alaska as a whole.
Politics vary noticeably by block within 99603. The east side runs the most Democratic (D+9) and the northeast side runs the most Republican (R+25), a spread of about 34 points.
Why 99603 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 99603. None of them point strongly toward either party.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; 99603, AK sits above the national average on this measure.
Why turnout in 99603 looks the way it does
Turnout in 99603 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Alaska Division 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. AK did not have precinct-level voting records available for training, so the figures here come from extrapolation across demographic, health, and land-use features rather than local ground truth. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.