97730 is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 86% of adults in 97730 typically vote, above the U.S. average of about 62%. Among adults in 97730, ~42% vote Democratic, ~44% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 97730 compares
97730 runs about 15 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while 97730 sits closer to the political middle.
Why 97730 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 97730, not a ranked or complete list of what matters most.
97730 votes against the grain of Oregon. Oregon leans Democratic overall, while 97730 runs about 15 points more Republican.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 97730, OR sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 97730 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 97730 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 68%, about 8 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and more than 99% of adults in 97730 have completed high school, in the top fraction of zip codes. 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 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.