Updated annually in July

Population change

In accordance with RCW 43.62.035, the Office of Financial Management 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.

The State Data Center (SDC) program is a cooperative program between the states and the Census Bureau created in 1978 to make data available locally to the public through a network of state agencies, universities, libraries, and regional and local governments. The Business and Industry Data Center (BIDC) program was added in 1988 to meet the needs of local business communities for economic data. The Office of Financial Management is the state agency responsible for administering these programs in Washington state.

Click on a tab below to access geographic data. Some of the data files are large and may require additional time to download.