The 249th Coast Artillery Regiment was a Coast Artillery Corps regiment in the Oregon National Guard. It garrisoned the Harbor Defenses of the Columbia, Oregon and Washington 1924–1944.

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."