Allows you to search for properties sold in King County by parcel number or area. You can filter by tax year. Useful for pulling up past sales records for specific parcels or neighborhoods.

Their property lookup tools often include sale history for individual properties (dates, prices) plus property characteristics.

They provide indices like the “All-Transactions House Price Index” for King County which track changes in sales prices over time. It won’t give every single sale, but gives you trend data.

Historical data on housing inventory (e.g. count of listings) for King County.

Provides forecasts of housing need (permanent & emergency), distribution to jurisdictions. Useful for planning & comparison.

Shows how many low-income households are heavily burdened by housing costs; vacancy rates; availability of affordable units; progress on housing goals.

Monthly/quarterly data on listings, selling prices, inventory, etc., for King County and neighboring counties.

Washington State Criminal Justice Data from 1990.

Annual reports (“Crime in Washington”), historical trends.

Pixel-level or district-level maps, recent crime incidents, types of crime.

Localized city data that helps when visitors are interested in particular neighborhoods.

Geologic hazard maps: earthquakes, faults, landslides, tsunami risk, mineral hazards, etc.

Floodplain mapping, flood risk, coastal hazards, etc.

Data and analysis of Washington's employment conditions, economy, job market and workforce.

The Forecasting division conducts research on a variety of issues related to the state budget, public policy, and demographics. The Population unit develops official state and local population estimates and projections for use in the allocation of certain state revenues, growth management, and other planning functions.

A nationwide survey that provides annual data on housing, income, employment, education, and demographics. Visitors can explore King County–specific statistics such as median household income, poverty rates, housing costs, and population trends.
For example: King County, WA housing costs