Since 1944 many ORTHOPTERA have been collected by Entomologists, Technicians and other research workers from different Provinces of Iran. Index and the names of collectors (leg.) have been mentioned at the end of the present list. Identification of most of species has been done by the Author, and a few of the species are identified by Sir Boris Uvarov, V. Dirsh, G. Bei-Benko, L. Mistshenko, M. Shumakov, N. Alexandrov and L. Descamps. I would like to express my deep appreciation to Orthopterologists in outside and also my colleagues in Iran, who have collected many species from different parts of the country. The present paper contains 2 families: 1- Pamphagidae: 2 Subfamilies, 14 Genera, 46 Species, 16 Subspecies and also 2 Holotypes, 1 Allotype and 37 Paratypes. 2- Pyrgomorphidae: 1 Subfamily, 5 Genera and 5 Species. All specimens have been deposited in Insect Taxonomy Research Department of Plant Pests and Diseases Research Institute (Tehran: Evin).