William H. Warner

William H. Warner
Born8 May 1812
Died26 September 1849(1849-09-26) (aged 37)
Northeastern California
Allegiance United States
BranchUnited States Army
Service years1836–1849
RankFirst Lieutenant
Brevet Captain
UnitCorps of Topographical Engineers
ConflictsSecond Seminole War
Mexican–American War

William Horace Warner (8 May 1812 – 26 September 1849) was an officer in the United States Army's Corps of Topographical Engineers. In 1849, he led an Army survey party north from Sacramento through the uncharted country of northeastern California into south central Oregon. Warner was killed by Native Americans in northeastern California, just south of the Oregon border. In the mid-nineteenth century, two army outposts in southern Oregon were named after Warner. Today, the Warner Mountains, Warner Valley, and a number of other landmarks bear his name.