Deer Island, OR Political Map | Democrat & Republican Areas in Deer Island

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

Deer Island leans heavily Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.

 

About 82% of adults in Deer Island typically vote, above the U.S. average of about 62%. Among adults in Deer Island, ~29% vote Democratic, ~53% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.

How Deer Island compares

Among cities within 25 miles, Deer Island leans more Republican than 34 of 51 neighbors.

Deer Island runs about 45 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while Deer Island is one of the few Republican-leaning pockets.

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

Deer Island votes against the grain of Oregon. Oregon leans Democratic overall, while Deer Island runs about 45 points more Republican. A high family-household share predicts Republican voting, and about 76% of households in Deer Island are family households, above 80% of cities.

Park access and Republican lean

Places with low park coverage tend to lean Republican; Deer Island, OR sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.

Why turnout in Deer Island looks the way it does

Homeowners vote more often than renters. About 92% of households in Deer Island own their home, about 18 points above the Oregon average of 74%. 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 Oregon Secretary of State, Elections Division, 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. Full methodology and findings: political spectrum map.

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