Horr is a book by the Iranian author Ali Shariati. Horr may also refer to: Head of the River Race (HORR), a processional rowing race held annually on the Thames in London Roswell G. Horr (1830–1896), U.S. Representative from Michigan Ralph Horr (1884–1960), U.S. Representative from Washington Horr, Iran, a city in Khuzestan Province Horr Rural District, in Kermanshah Province, Iran