George W. LeBreton (1810 – March 4, 1844) was a pioneer politician in the Oregon Country and served as the official recorder in the Provisional Government of Oregon. He was born in Massachusetts.^[1]

LeBreton traveled to Oregon in 1840 aboard the vessel Maryland of Captain John H. Couch, an early sea merchant in Portland.^[2][3] On 18 February 1841, he was elected as the recorder for the Champoeg Meetings and for the probate court that was created.^[1] In 1843, when the provisional government was formed, he was again elected as the recorder, the forerunner to the office of Secretary of State.^[1]

LeBreton was a key figure in the Cockstock incident of 4 March 1844. A group of settlers, led by LeBreton tried to capture Cockstock, a Molala man. During the ensuing violence LeBreton was stabbed, shot, and killed by Cockstock.^[4] In turn, his attacker was killed by Winslow Armstrong. In the aftermath a militia unit called the Oregon Rangers was formed.^[2][4]

• List of assassinated American politicians