Washington State OFM Forecasting Division provides estimates of state and local population, monitors changes in the state economy and labor force, and conducts research on a variety of issues affecting the state budget and public policy. This site offers links to information about  Walla Walla County, including a variety of sources dealing specifically with Population, the Economy, county government, Finance, Criminal Justice, and Human Services: http://www.ofm.wa.gov/localdata/wall.asp