1930
- Population of King County is 463,517.
- First countywide public relief program begins.
- 4,000 unemployed workers from across Washington storm and occupy the City-County Building for three days.
- King County Planning Commission is established.
- Federal public works program established (Works Progress Administration) by FDR to address severe unemployment problems of Great Depression. Improvements to the King County airport (Boeing Field) and many road construction projects are undertaken under the auspices of the WPA.
- State Legislature enacts County Park Law that allows county acquisition of parks and recreation sites. County establishes it first parks department.
- Washington State Aid Highway Act passes This act provides state aid for the construction and maintenance of county roads, bridges, etc. It also mandates collection of the motor vehicle excise tax.
- County commissioners establish the department of public works.
1840s 1850s 1860s 1870s 1880s 1890s