Oregon Voter Registration Data by District and Party

Voter registration data from Oregon's state government includes party affiliation counts aggregated by state senate, state representative, and congressional districts. The dataset is published by data.oregon.gov and was last updated in March 2026. It reflects registration boundaries after a redistricting process.

Use Cases

• Analyze PARTY distribution across different COUNTY and SR Desc (State Representative District) to identify partisan strongholds.
• Track changes in SUM(PARTYCOUNT) over Date to measure registration trends following redistricting events.
• Map voter registration density by joining on geographic identifiers like SS Code (State Senate Code) and Cong Code (Congressional Code).
• Compare registration totals between SR Desc and SS Desc to understand representation at different government levels.

Strengths

• Data is provided at the district level for state senate (SS Code), state representative (SR Code), and congressional (Cong Code) geography.
• Includes a temporal component with a Date field for tracking changes over time.
• Covers multiple political PARTY affiliations for analysis.

Limitations

• Sample data and total row counts are unavailable, preventing assessment of dataset size and completeness.
• Key metrics like total registered voters per county or district must be derived from SUM(PARTYCOUNT) aggregates.
• The description notes a separate dataset for pre-redistricting data, indicating potential fragmentation of historical analysis.

Provenance

Source

data.oregon.gov, likely originating from the Oregon Secretary of State Elections Division.

Collection Method

Aggregated from official voter registration records following redistricting.

Time Range

null

Freshness

Last updated March 2026.

Geography

State of Oregon, USA, broken down by county and legislative districts.