The Oregon Army National Guard is a federally mandated and equipped military organization under the civilian direction of the Oregon Military Department, with the Governor of Oregon as its Commander-in-Chief. It responds to state and national emergencies, military conflicts and natural disasters, and conducts search and rescue operations. While the history of the militia dates back to the establishment of the first Oregon militia in 1843, the present Guard was not established until after 1903. The modern Guard includes citizen soldiers, and its motto is "When we are needed, we are there."

The Oregon Military Department is an agency of the government of the U.S. state of Oregon, which oversees the armed forces of the state of Oregon. Under the authority and direction of the governor as commander-in-chief, the agency is responsible for planning, establishing, and enforcing rules and procedures governing the administration, supply, and training of the Oregon National Guard, when not in the active service of the United States. The Department also maintains all state-owned or leased military facilities, including posts, camps, military reservations, and rifle ranges.