Major Harold Geiger (October 7, 1884 – May 17, 1927) was an American military officer and pioneer U.S. Army aviator, who was killed in an airplane crash in 1927.

[1] Geiger was a cadet at the United States Military Academy June 16, 1904, to February 14, 1908, when he was graduated as an Army second lieutenant in the Coast Artillery Corps.

[2] As a lieutenant, Geiger commanded the aviation assets of the United States Army Signal Corps in the Hawaiian Islands.

Lieutenant Geiger arrived in Oahu with two Curtiss Aeroplane Company seaplanes, a mechanic, 12 enlisted men, and other equipment.

While attending the Air Corps Tactical School at Langley Field, his airplane and another flown by fellow student Horace Meek Hickam hit each other and crashed.

[7] A newspaper article reported six mechanics and officers at the Middleton Air Station, at Olmsted Field, Pennsylvania as saying that Geiger's airplane dove into the ground from a height of 50 feet (15 m).

[9] In 1941, the United States Department of Defense purchased the area then known as Sunset Field from Spokane County, Washington, as a World War II training facility for future pilots of the Boeing B-17 Flying Fortress and the Douglas C-47 Skytrain.