| Ortaköy, Ereğli | Ortaköy, Eskipazar | Ortaköy, Feke |
| Ortaköy, Fethiye | Ortaköy, Görele | Ortaköy, Gündoğmuş |
| Ortaköy, Güneysu | Ortaköy, Gürpınar | Ortaköy, Giresun |
| Ortaköy, Hınıs | Ortaköy, Hendek | Ortaköy, Kağızman |
| Ortaköy, Kale | Ortaköy, Karasu | Ortaköy, Karlıova |
| Ortaköy, Kastamonu | Ortaköy, Kavak | Ortaköy, Kavaklıdere |
| Ortaköy, Kaynarca | Ortaköy, Kızılcahamam | Ortaköy, Kızıltepe |
| Ortaköy, Koyulhisar | Ortaköy, Kula | Ortaköy, Kumluca |
| Ortaköy, Maçka | Ortaköy, Mamak | Ortaköy, Manisa |
| Ortaköy, Mardin | Ortaköy, Milas | Ortaköy, Muğla |
| Ortaköy, Mudurnu | Ortaköy, Mut | Ortaköy, Ordu |
| Ortaköy, Orhaneli | Ortaköy, Orhangazi | Ortaköy, Salihli |
| Ortaköy, Sürmene | Ortaköy, Silopi | Ortaköy, Sulakyurt |
| Ortaköy, Sungurlu | Ortaköy, Taşköprü | Ortaköy, Tire |
| Ortaköy, Tirebolu | Ortaköy, Tufanbeyli | Ortaköy, Uşak |
| Ortaköy, Uludere | Ortaköy, Vakfıkebir | Ortaköy, Yağlıdere |
| Ortaköy, Yeşilyurt | Ortakdaracık, İmranlı | Ortakent, Muş |
| Ortakentyahşi, Bodrum | Ortaklar, Şahinbey | Ortaklar, Şemdinli |
| Ortaklar, Çamlıhemşin | Ortaklar, Germencik | Ortaklar, Havza |
| Ortaklar, Köprüköy | Ortaklar, Sivrihisar | Ortaklar, Yıldızeli |
| Ortaklı, Afşin | Ortaklı, İslahiye | Ortaklı, Eruh |
| Ortaklı, Mazıdağı | Ortakonuş, Gündoğmuş | Ortalar, Susuz |
| Ortalı, Beytüşşebap | Ortalıca, Tosya | Ortalık, Ayancık |
| Ortale | Ortaliella | Ortalis |
| Ortalis canicollis | Ortalis canicollis canicollis | Ortalis canicollis pantanalensis |
| Ortalis cinereiceps | Ortalis columbiana | Ortalis erythroptera |
| Ortalis garrula | Ortalis guttata | Ortalis guttata guttata |
| Ortalis guttata subaffinis | Ortalis leucogastra | Ortalis motmot |
| Ortalis poliocephala | Ortalis ruficauda | Ortalis superciliaris |
| Ortalis vetula | Ortalis vetula deschauenseei | Ortalis vetula mccallii |
| Ortalis vetula pallidiventris | Ortalis vetula vetula | Ortalis wagleri |
| Ortamahalle, Kartal | Ortamandıra, Altıeylül | Ortanca, Akçakoca |
| Ortanca, İpekyolu | Ortanca, Hasköy | Ortanca, Kahta |
| Ortanca, Siverek | Ortanca, Van | Ortanköy, Çamlıhemşin |
| Ortaoba, Çekerek | Ortaoba, Edremit | Ortaoba, Gönen |
| Ortaoba, Karaman | Ortaoba, Karapınar | Ortaova, Merzifon |
| Ortapazar, Rize | Ortapınar, Şuhut | Ortasarıbey, Karacabey |
| Ortasöğütlü, Terme | Ortasökü, Bozkurt | Ortasöken, Keskin |
| Ortaseki, Koyulhisar | Ortasu, Uludere | Ortatepe, İliç |
| Ortatepe, Bozova | Ortatepe, Göksun | Ortatepe, Kale |
| Ortatepe, Perşembe | Ortatopaç, Şarkışla | Ortayamaç, Tutak |
| Ortayayla, Çamlıhemşin | Ortayayla, Erciş | Ortayazı, Başkale |
| Ortayazı, Ergani | Ortayazı, Senirkent | Ortayazı, Suluova |
| Ortayokuş, Ağrı | Ortayol, Başkale | Ortayol, Halfeti |
| Ortayol, Pazar | Ortíz (khu tự quản) | Orte |
| Ortega | Ortega hispanica | Ortega, Tolima |
| Ortegocactus | Ortegocactus macdougallii | Orteguaza funeraria |
| Orteguaza lichenigera | Ortenau (huyện) | Ortenaukreis |
| Ortenberg, Ortenau | Ortenberg, Wetterau | Ortenburg |
| Ortezia aciculata | Ortezia annulicornis | Ortezia egregia |
| Ortezia varia | Ortezzano | Orth an der Donau |
| Orthaea abbreviata | Orthaea apophysata | Orthaea brachysiphon |
| Orthaea breviflora | Orthaea caudata | Orthaea coriacea |
| Orthaea crinita | Orthaea ecuadorensis | Orthaea ferreyrae |
| Orthaea fimbriata | Orthaea hispida | Orthaea ignea |
| Orthaea merumensis | Orthaea minor | Orthaea oedipus |
| Orthaea oriens | Orthaea panamensis | Orthaea paruensis |
| Orthaea pinnatinervia | Orthaea secundiflora | Orthaea stipitata |
| Orthaea thibaudioides | Orthaea venamensis | Orthaea weberbaueri |
| Orthaea weberbauerii | Orthaea wurdackii | Orthaltica |
| Orthaltica arabica | Orthaltica australis | Orthaltica bakeri |
| Orthaltica bengalensis | Orthaltica borneoensis | Orthaltica brunnea |
| Orthaltica capensis | Orthaltica dakshina | Orthaltica foveata |
| Orthaltica kirejtshuki | Orthaltica mindanaoensis | Orthaltica nuwaraeliyana |
| Orthaltica orientalis | Orthaltica pahangi | Orthaltica purba |
| Orthaltica rangoonensis | Orthaltica visayanensis | Orthantha lutea |
| Orthanthera | Orthanthera albida | Orthanthera butayei |
| Orthanthera gossweileri | Orthanthera jasminiflora | Ortheaga |
| Orthel, Quận Hancock, Iowa | Orthell, Quận Williams, Bắc Dakota | Orthemis |
| Orthemis aciculata | Orthemis aequilibris | Orthemis ambinigra |
| Orthemis ambirufa | Orthemis anthracina | Orthemis attenuata |
| Orthemis biolleyi | Orthemis celata | Orthemis cinnamomea |
| Orthemis concolor | Orthemis coracina | Orthemis cultriformis |
| Orthemis discolor | Orthemis faaseni | Orthemis ferruginea |
| Orthemis flavopicta | Orthemis garrisoni | Orthemis harpago |
| Orthemis levis | Orthemis macrostigma | Orthemis nodiplaga |
| Orthemis paulsoni | Orthemis philipi | Orthemis regalis |
| Orthemis schmidti | Orthemis sulphurata | Orthemis tambopatae |
| Orthemis teres | Orthenches semifasciata | Orthetrum |
| Orthetrum abbotti | Orthetrum africanum | Orthetrum albistylum |
| Orthetrum anceps | Orthetrum angustiventre | Orthetrum austeni |
| Orthetrum austrosundanum | Orthetrum azureum | Orthetrum balteatum |
| Orthetrum borneense | Orthetrum boumiera | Orthetrum brachiale |
| Orthetrum brunneum | Orthetrum caffrum | Orthetrum caledonicum |
| Orthetrum camerunense | Orthetrum cancellatum | Orthetrum capense |
| Orthetrum chrysis | Orthetrum chrysostigma | Orthetrum coerulescens |
| Orthetrum glaucum | Orthetrum guineense | Orthetrum guptai |
| Orthetrum helena | Orthetrum hintzi | Orthetrum icteromelan |
| Orthetrum icteromelas | Orthetrum internum | Orthetrum japonicum |
| Orthetrum julia | Orthetrum kollmannspergeri | Orthetrum kristenseni |
| Orthetrum latihami | Orthetrum lemur | Orthetrum lineostigma |
| Orthetrum luzonicum | Orthetrum machadoi | Orthetrum macrostigma |
| Orthetrum martensi | Orthetrum melania | Orthetrum microstigma |
| Orthetrum migratum | Orthetrum monardi | Orthetrum nitidinerve |
| Orthetrum poecilops | Orthetrum pruinosum | Orthetrum ransonneti |
| Orthetrum robustum | Orthetrum rubens | Orthetrum sabina |
| Orthetrum saegeri | Orthetrum sagitta | Orthetrum serapia |
| Orthetrum signiferum | Orthetrum silvarum | Orthetrum stemmale |
| Orthetrum taeniolatum | Orthetrum testaceum | Orthetrum translatum |
| Orthetrum triangulare | Orthetrum trinacria | Orthetrum villosovittatum |
