A good site for general data - demographic, economic and so on - around the Northwest: Co-backed by the Community Action Partnership and the University of Idaho, the site Indicators Northwest is well worth a look.
It describes itself as "a one-stop source of up-to-date information on states, counties, reservations, and tribes. Whether you work for a non-profit group, private firm or public agency, this site is for you. Here, you'll find text summaries that highlight major trends in each indicator. You'll also find information displayed with graphs and maps. Users who want to analyze the indicators further can download data in Excel spreadsheets."
Check it out.