The Washington National Guard is one of the four elements of the State of Washington's Washington Military Department and a component of the National Guard of the United States. It is headquartered at Camp Murray, Washington and is defined by its state and federal mission. At the call of the Governor, the Washington National Guard will mobilize and deploy during times of state emergency to augment local jurisdictions and responders in their efforts to protect lives and property. The Washington National Guard is also subject to the call of the President of the United States to serve as part of the total U.S. Military force.

The Washington Army National Guard is a component of the United States Army and the Washington National Guard based in Washington. The history of the Washington Army National Guard dates back to 1854 with formation of the Washington Territorial Militia. The command is headquartered at Camp Murray in Pierce County. It consists of 6,200 soldiers in two brigades and various smaller units located throughout the state.