Indus Valley civilization kaa kshetr atyant vyaapak thaa. Aarambh men Harppa aur Mohanajodaro ki khudaai se is civilization ke pramaan mile hae. Ata vidvaanon ne ise Indus Valley ki civilization kaa naam diyaa, kyonki yah kshetr sindhu aur usaki sahaayak nadiyon ke kshetr men aate hae, par baad men Ropar, Lothal, Kaalibanga, vanamaali, rangaapur aadi kshetron men bhi is civilization ke avashesh mile jo sindhu aur usaki sahaayak nadiyon ke kshetr se baahar the. Ata kai Historyakaar is civilization kaa pramukh kendr harppaa hone ke kaaran is civilization ko ""harppaa civilization"" naam denaa adhik uchit maanate hae.