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.

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.

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

These detailed demographic profiles are based on the 2010 Census Summary File 2 product which contains detailed demographic information for up to 331 different race/ethnic groups (250 in the case of Washington state). Summary File 2 includes information on age, sex, households, families, relationship to householder, housing units, and group quarters. Data are available for geographic entities that have at least 100 persons in a specific race/ethnic group.

All race/ethnic groups that meet the minimum population threshold of 100 persons are included in each demographic profile.

An asterisk (*) denotes that the area does not meet the minimum population threshold of 100 persons for any single race/ethnic group.

Note: Detailed demographic profiles for urban areas consisting of state parts (e.g., Lewiston, ID--WA Urbanized Area) can be accessed from this page.