The insect order Orthoptera is comprised of 20,000 species in 28 families and 2 suborders. At present the mitochondrial genomes of only two species in two families have been sequenced and analyzed to assist in phylogenetic studies. This project provides an additional four genomes from the family Eumastacidae, Myrmecophilidae, Tettigoniidae and Cantantopidae with preliminary data from these families: Cylindrachetidae, Raphidophoridae and Acrididae. The addition of these genomes with data from the already completed genomes of Acrididae and Gryllotalpidae provide a more comprehensive look at phylogenetic relations within Orthoptera. These genomes were sequenced primarily by primer-walking, and the data provide significant information regarding the structure and order of protein-coding and tRNA-coding regions within mitochondrial genomes. Genome structure and rearrangements are also highlighted in this study and a molecular based tree is presented for the order Orthoptera.