Other pages about the topic: Population
In accordance with RCW 43.62.035, the Office of Financial Management (OFM) shall determine the percentage increase in population for each county over the preceding ten-year period, as of April 1.
Office of Financial Management
Forecasting and Research Division
P.O. Box 43124
Olympia, WA 98504-3124
360-902-0599 -- Main Reception
360-586-1988 -- Fax
Updated annually in November.
Click on a tab below to access geographic data. Some of the data files are large and may require additional time to download.
Population density is the average number of people per unit of land area. In the U.S., the most common unit of population density is persons per square mile. The land area measurement excludes lakes and other water areas within.
Included here are documents describing the process of GMA projections.
Small area estimates program: GIS shapefiles for select census geographic areas and other areas of statewide significance. Includes annual population and housing estimates from 2010 onwards.