Lighthorse or Light Horse most often refers to Light cavalry, but may also refer to:
2nd/14th Light Horse Regiment, Australian Army Regiment 3rd Squadron, 17th Cavalry Regiment (United States) Australian Light Horse, mounted infantry who fought in World War I 1st Light Horse Brigade 2nd Light Horse Brigade 3rd Light Horse Brigade 4th Light Horse Brigade 5th Light Horse Brigade Calcutta Light Horse, Indian Army reserve unit during the British Raj Henry Lee III, nicknamed "Light Horse Harry" Horse&Rider, magazine formerly called Light Horse Light Horse Regiment, South African Army unit Lighthorse (American Indian police) The Lighthorseman, a pub in York, England The Lighthorsemen (film), a 1987 feature film about an Australian Light Horse unit Rutherford's Light Horse expedition of July 1776 South Alberta Light Horse