Ten species of scorpions belonging to three families are reported from the Lorestan Province of Iran. Of these, five species are recorded from the province for the first time: Hottentotta zagrosensis Kova ík, 1997; Mesobuthus eupeus phillipsii (Pocock, 1889); Orthochirus iranus Kova ík, 2004; Razianus zarudnyi (Birula, 1903); and Scorpio maurus townsendi (Pocock, 1900). One new species is described, Hottentotta lorestanus sp. n.; it can be easily distinguished from the other four species of the genus known from Iran by its coloration; it is the only Iranian species which has the entire pedipalps yellow and the metasomal segments I to IV greenish gray. Also presented is a key to all species of scorpions found in the province.