Aggregate eviction filings are sourced from the Washington Office of Civil Legal Aid (OCLA), which compiles monthly unlawful-detainer (UD) case counts from each of Washington's 39 superior courts. The OCLA series covers January 2016 – April 2026; charts end at April 2026. The feed reports court-side counts only: no defendant identifiers, addresses, party-level fields, or filing reasons, so the race-disparity analysis featured on other ERN state profiles is not run here. Renter-household denominators come from the American Community Survey 5-year estimates (table B25003) at the county and state level; cost-burden shares (renters paying 30% or more of income on rent) come from ACS table B25070.
A note on counts. The numbers above reflect counts reported by each superior court to the Washington Office of Civil Legal Aid. The series is reasonably complete back to 2016, but the most recent month or two may still be settling as smaller-county clerks file their monthly reports. A filing is the start of a case, not a removal or a judgment; most resolve short of a lockout, so we report it as a leading indicator of housing distress. The rate counts filings rather than distinct households, so a renter household taken to court more than once in a year is counted each time. King County's UD case-number format historically differed from the other 38 counties; OCLA's compilation harmonizes them upstream, so the counts here are directly comparable across counties.
Figure 2 projection. The dashed extension on the 2026 bar is a year-end estimate from a seasonal ARIMA model fit to monthly statewide filings from January 2023 onward (the post-recovery plateau). The auto-selected order on this release is SARIMA(3,1,0)(1,0,0)[12] (forecast::auto.arima in R). We forecast the eight months remaining in 2026, sum them with the year-to-date actual (8,655 filings through April 2026), and report the expected count (~26,314) plus an 80% range of 22,874–29,754. It does not account for policy or economic shocks (a new moratorium, a court-system backlog, an enforcement change), which would shift the trajectory in ways the model can't see. As a robustness check, a longer-window SARIMA and an exponential-smoothing (ETS) model both land within about one percent of this estimate. In plain terms: the dashed line is the expected count, but the real 2026 total could come in anywhere across that range, and because the bottom of it falls below 2025's 23,968, a flat or slightly-down year is not ruled out.
Map bins (Lower / Moderate / High / Extreme). The four-tier choropleth uses Jenks-equivalent natural breaks computed with the ckmeans algorithm. Each polygon's value is the annualized rate (filings in the active window, scaled to a 12-month equivalent and divided by renter households), so a 3-month window and a 5-year window are directly comparable. Bins recompute every time the slider moves; labels stay constant, numeric thresholds float to the data on screen.
For ERN-wide methodology see the methodology page. Code at github.com/evictionresearch/washington. Prior Washington research is archived at the State of Evictions in Washington, 2020 report.
On the structure. Each chart is numbered and titled with a claim sentence, followed by a short interpretive description: the finding stated plainly, then the evidence behind it. The data, the methods, and the conclusions are the Eviction Research Network's.
Data delivered: 2026-06-05. Profile rendered: 2026-06-05.