Washington State Campaign Finance Report History and Amendments

Washington State's Public Disclosure Commission provides a list of all campaign finance reports filed over the last 10 years. The dataset includes report types C3, C4, C5, C6, and LMC, along with amendments and attached schedules. It is intended for tracking report amendments and examining filer history, with data updated as of April 2026.

Use Cases

• Track amendment chains for a specific report using the `amends_report` and `amended_by_report` columns.
• Analyze reporting frequency and methods by `filer_id` across `election_year` using `filing_method` and `receipt_date`.
• Examine geographic distribution of campaign finance activity via `jurisdiction`, `jurisdiction_county`, and `legislative_district`.
• Identify report types and purposes by filtering on `type` (e.g., C3, C4) and `for_or_against` columns.
• Study committee and candidate details by joining on `committee_id` or `filer_id` with other datasets using `report_number`.

Strengths

• Contains records for the last 10 years of campaign finance reports.
• Includes multiple report types (C3, C4, C5, C6, LMC) and their amendments.
• Provides fields to track amendment history and report lineage.

Limitations

• The dataset may contain incomplete or incorrect information as noted by the provider.
• Actual financial values are not included; requires joining with other datasets.
• Sample size and total row count are unknown.

Provenance

Source

Washington State Public Disclosure Commission (PDC) via data.wa.gov.

Collection Method

Best-effort compilation of filed campaign finance reports and amendments.

Time Range

Last 10 years.

Freshness

Last updated on 2026-04-03.

Geography

Washington State, USA.