Interactive Data

Use interactive data graphics to explore and analyze data, ask questions and find answers. Interactive features let you drill down into maps and charts for more details, and immediately see the data change.

Annual Ratio Study Results

These tables show the results of the Department of Revenue's annual ratio study by county for both real and personal property. The ratio study is a statistical study that is performed annually by the Department. The assessment or indicated ratio is the total assessd value of property in the county divided by the total true and fair value.

Board of Equalization Statistics

Provides various statistics related to county board of equalization operations including: decision outcomes, appeals filed, workload comparisons by county, and 4 year historical comparisons. Published annually.

Comparative State and Local Taxes

These tables show Washington's relative tax position among the other states in three categories: (1) Taxes Per $1,000 Personal Income, (2) Taxes Per Capita, and (3) Other Interstate and Historical Tax Comparisons.

Comparison of County Assessor Statistics Report

Provides various statistics related to county assessment office operations including: county characteristics, assessor staffing levels, workload comparisons, assessor budgets and budget comparisons, ratios and appeals, and historical comparisons. Published annually.

Local Taxing District Levy Detail

These tables present property tax levy information for all taxing districts levying a tax in a given year. Each district has its own nine-digit code. An explanation of the codes is included, as is an explanation of the data in each column of the table. Information will be posted annually.

Property Tax Statistical Reports

Provides levy and collection data obtained from county assessors and treasurers for all taxing districts imposing an ad valorem property tax. Published annually.

State-Assessed Utility Valuations

These tables present calendar year values determined by the Department of Revenue for utility companies that operate on an intercounty basis in Washington State. Prior to 2000, this data was included in our Tax Statistics publication in Section IV. Published annually.

Tax Statistics

A historical record of tax collections and related statistics in Washington including: state excise tax statistics, property tax levies and collections, and property valuations and assessment ratios. Published annually.

Measuring Real Property Appraisal Performance in Washington's Property Tax System

These reports are an evaluation of the performance of the property tax appraisal system in Washington. They are fairly technical in nature. They use statistics related to assessed values and market values. The report uses charts of these statistics to illustrate how well the appraisal system is working in Washington

Real Property Ratio Summary Statistics Report

These reports use all valid sales in each county to show several statistical measure of uniformity and level of assessment. These reports state the results as they are, with no consideration given to the number of observations and with no trimming of outliers. For these reports no binomial tests or bootstrap analysis were complete to determine the level of confidence in the results. In many cases, due to the limited number of observation, it cannot be said with certainty that the statistical standard has been met or not.

2018 Real Property Ratio Summary Statistics Report

2017 Real Property Ratio Summary Statistics Report

2016 Real Property Ratio Summary Statistics Report 

2015 Real Property Ratio Summary Statistics Report


Annual State Levy Worksheets

Title Last Updated Size (Kb)
Computation of 2008 State Property Tax Levy 05/19/2011 40.71
Computation of 2009 State Property Tax Levy 05/19/2011 42.23
Computation of 2010 State Property Tax Levy 05/19/2011 42.11